Answer:
D. A rigid structure
Explanation:
The cell wall, or the outer covering of a cell, is a rigid layer of polysaccharides outside the plasma membrane in multiple cell types including plant, animal, etc.
how long does it take to see results from weight lifting
Building muscle takes time. To notice a change, it may take three to four weeks.
After 12 weeks, you'll start to see some genuine improvements, but Haroldsdotti says it "all depends on your goals and what kind of strength training you are doing."
How frequently should I work out to get results?
At least three days a week should be spent lifting weights. According to the research, two days of training each week are the absolute minimum required to enhance muscle growth. Depending on your current level of fitness, you can adjust the way you set up your workouts and the number of days you spend on strength training.
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The triple helix structure of collagen protein is possible largely due to
a. glycine and its small side chain b. an exact palring of pyrimidlnes and purlnes c. the covalent disulfide bridges between cystelnes d. the absence of carboxyl groups
The triple helix structure of collagen protein is possible largely due toa. glycine and its small side chain.
due to the excessive abundance of glycine and proline contents, collagen fails to form a normal α-helix and β-sheet structure. three left-exceeded helical strands twist to form a right-surpassed triple helix. A collagen triple helix has 3.three residues in keeping with turn.
In collagen, glycine is needed at each 1/3 role, due to the fact the meeting of the triple helix places this accretion on the interior (axis) of the helix, wherein there's no space for a larger facet institution than glycine's unmarried hydrogen atom.
Collagen consists of three chains. The chains are wound collectively to form a triple helix. considering the fact that glycine is the smallest of all the amino acids, it permits the chain to form a good configuration, and and it could withstand
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Option a is Correct. A. glycine and its short side chain are significantly responsible for the collagen protein's triple helix shape.
Collagen is unable to form a typical -helix and -sheet structure because of the overabundance of glycine and proline. A right-surpassed triple helix is created by the twisting of three left-exceeded helical strands. A triple helix of collagen contains 3.three residues per turn.
Since the triple helix's intersection places each 1/3 function on the inner (axis) of the helix, where there is no room for a greater facet size than glycine's single hydrogen atom, glycine is required at each position in collagen.
The three chains that make up collagen. A triple helix is created when all the chains are twisted together. Given that glycine is the smallest amino acid, it allows the chain to establish a good shape and can tolerate a lot of stress.
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Which type of afferent neuron delivers information to the brain about movement at joints?A.ChemoreceptorsB.MechanoreceptorsC.Proprioceptors
C.Proprioceptors: Proprioceptors are afferent neurons that deliver information to the brain about movement at joints, as well as the position of the body in space. They are responsible for the sense of body awareness and are triggered by changes in muscle tension, joint position and movement.
Proprioceptors are afferent neurons that deliver information to the brain about movement at joints. These neurons detect changes in the body's position, sense of balance, and the force of muscular contractions. Proprioceptors are located in muscles, tendons, and joints, and they act as sensors of movement and position.
Proprioception is essential for the brain to be able to understand the body's position in space. Proprioceptors detect changes in position and send signals to the brain. This allows us to maintain balance, coordinate voluntary movements, and to know the location of our limbs and joints.
Proprioceptors are sensitive to the force of muscular contractions, so they can tell the brain when muscles are contracting, and when they are being stretched. This helps the brain to coordinate movement, and to maintain balance.
Proprioceptors are also sensitive to changes in the environment. They can detect when a surface is slippery, or when the ground has changed. This helps us to adjust our posture and gait to stay upright.
Proprioception is important for everyday activities such as walking, running, and balancing.
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Proprioceptors are the afferent neurons that deliver to the brain about the movement of joints. So the correct option is Option C.
It is a sensory receptor that receives stimuli from within the body so thereby in turn responds to the position and movement of the body. The proprioceptive sense is said to be composed of information that comes from sensory neurons located in the inner ear and in the receptors of stretch that are located in the muscles and the ligaments.
The proprioceptors which present in ligaments have been found in fruit flies, nematode worms, African clawed frogs, and zebrafish. But,the corresponding human proprioceptor has not been discovered yet. The examples of proprioceptors include the golgi tendon organ and muscle spindles.
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which is not a function of lipids?group of answer choicesenergy storageweigh you downstructurehormones
Answer:
An ______ forms myelin sheaths around the axons of several central nervous system neurons.
Explanation:
31. when the homologous pairs separate during anaphase i do the homologous chromosomes still contain the same type of genes? explain your answer fully.
This separation means that each of the daughter cells that results from meiosis I will have half the number of chromosomes of the original parent cell after interphase.
Also, the sister chromatids in each chromosome still remain connected. Chromosomes have been known to travel to the cell's opposing poles during anaphase 1.
This happens from the microtubule network imploding, which decreases the microtubule strands and allows the chromosomes to consolidate at the magnetic sides.
Anaphase A is the first component of anaphase 1, that occurs when the microtubule - connected filaments constrict and shorten. As a result, kinetochores travel in any of 2 ways: up or down.
The chromosomes move in the opposite direction from the kinetochores despite face the pole through this whole process. The third stage of meiosis in one is anaphase 1, whereas the third phase in another is anaphase 2.
With the assistance of centrosomes linked to the nucleus by cytoskeleton, a single pair of paired pairs, which forms a bivalent, is pushed toward the opposite poles of the cell throughout anaphase 1.
The centromere does not split in anaphase 1. It remains unchanged as a whole instead. This is so that the complete chromosome would travel to the polar poles, when in anaphase 2, both homologous chromosomes' centromeres split.
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if a section of dna has 27% thymine, how much cytosine will it have?
Answer:
23%
Explanation:
Since the thymine percent is 27%, the adenine percent is also 27%. This means that cytosine and guanine both have a percent of 23% in the DNA.
which method of reproduction should an organism that can reproduce both sexually and asexually use if their environment changes and it becomes more difficult to survive? why?
"Asexually reproduction should be the best method an organism that can reproduce both sexually and asexually use if their environment changes and it becomes more difficult to survive.
What is reproduction?If an organism that can reproduce both sexually and asexually experiences a change in its environment that makes survival more difficult, it should likely use asexual reproduction.
Asexual reproduction allows an organism to produce genetically identical offspring quickly and efficiently, which can increase the chances of survival in a challenging environment. Additionally, asexually reproducing organisms can take advantage of any beneficial mutations that may arise in their offspring, which can also increase their chances of survival.
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scientists were looking at 2 genes in dogs that control coat color. they bred two dogs together, one with golden fur and one with black fur, their puppies showed a ratio of 12, 3, 1 for combinations of those genes, what phenomena is on display here?
The phenomena showed a ratio of 12, 3, 1 for combinations of two dogs (golden fur and black fur) as dominant epistasis.
The interаction between two dogs together, one with golden fur and one with black fur, color is recessive to no color аt one аllelic pаir. This recessive аllele must be expressed before the specific color аllele аt а second locus is expressed. Аt the first gene golden colored dog is dominаnt to the black colored dog, аnd the gene symbols аre G = golden аnd g = colored. Аt the second gene balck is dominаnt to golden, аnd the symbols used аre B = black, b = colored. If the dihybrid is selfed, three phenotypes аre produced in а 12:3:1 rаtio.
9 G_B_ Golden Dominant golden allele negates effect of G allele
3 G_bb Black Dominant black allele negates effect of G allele
3 ggB_ Golden Recessive color allele allows golden allele expression
1 ggbb Black Recessive color allele allows black allele expression
Becаuse the presence of the dominаnt G аllele mаsks the effects of either the B or g аllele, this type of interаction is cаlled dominаnt epistаsis.
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DNA is made up of repeating units called monomers. The monomer of DNA is called a nucleotide. What are the three components of a nucleotide? A) ribose, phosphate, and a sugar B) phosphate, deoxyribose, and a sugar C) phosphate, ribose, and a nitrogen base D) phosphate, deoxyribose, and a nitrogen base
Answer:
I would say D. Phosphate, deoxyribose, and a nitrogen base
consider a cell that expresses an ion channel selective for cesium, but no other channels. the channel is open about half the time. you measure the membrane potential of the cell at room temperature and it is 58mv. what can you conclude about the concentration of cesium inside and outside of the cell?
About the concentration of cesium inside and outside of the cell we can conclude that the inside concentration is higher than the outside concentration.
The action potential is a brief phenomenon which depicts the fast opening and closure of voltage-dependent Na+-selective and K+-selective channels, which are necessary for the responsiveness of biomembranes. A core pore is surrounded by these and is protected by a selectivity filter made up of P-loops from every of the subunits.
Caesium is a delicate, golden-colored metal which reacts violently in water and is immediately attacked by air. Caesium compounds are most frequently used as drilling fluids. In addition, they are utilised in the production of special optical glass, radiation monitoring apparatus, and as a catalytic promoter.
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genetic engineering is possible because the genetic code of all organisms is based on the same _______________. however, all attempts to genetically engineer new organisms are not successful.
Genetic engineering is possible because the genetic code of all organisms is based on the same ancestor.
In order to achieve a desired characteristic, genetic engineering may include introducing a gene from one species to an organism from a different species. Genetic engineering has been used in science and business to produce cancer treatments, brewing yeasts, and genetically altered plants, and animals, among other things.
DNA is inserted into an organism's genome as part of GM technology. New DNA is introduced into plant cells to create a GM plant. The cells are typically cultured in tissue culture after which they transform into plants. The modified DNA will be passed along to the seeds that these plants generate.
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Which is the mRNA molecule that would be transcribed from this DNA template: TGG-CAA-GTA-CGT
(A) UCCGUUCUUGCU
(B) ACCGUUCAUGCA
(C) ACCGTTCATGCA
(D) UGGCAAGUACGU
Answer:
ACC-GUU-CAU-GCA
a key characteristic of aquatic dead zones is . group of answer choices low concentrations of nitrogen and phosphorus a high concentration of ozone a low concentration of oxygen a lack of water
The low oxygen level in the water, known as hypoxia, is the condition for which the term "dead zone" has been most frequently used. A "dead zone" is a region where there is less dissolved oxygen in the water because most marine life there either perishes or, if it is mobile, like fish, leaves.
what is aquatic dead zones?A "dead zone" is a region where there is less dissolved oxygen in the water because most marine life there either perishes or, if it is mobile, like fish, leaves. Habitats that were once brimming with life end up being, in essence, biological deserts. Oceans and lakes all across the world have hypoxic, or low-oxygen, areas. Because most species need oxygen to survive, only a small number of organisms can flourish in hypoxic conditions. For this reason, these areas are referred to as "dead zones."
What creates oceanic dead zones and what are they?A dead zone is an oceanic (or lake) hypoxic area where there is not enough oxygen to sustain marine life. In shallow coastal and estuarine areas, this natural occurrence has already been expanding as a result of human activities.
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at what wind speed does a tropical storm turn into a hurricane?
A tropical storm turns into a hurricane when its maximum sustained wind speed reaches 74 miles per hour (119 km/h) or higher.
A tropical storm is a low-pressure weather system that develops over warm tropical waters and has maximum sustained winds of 39-73 miles per hour (63-118 km/h). These winds are caused by the rising warm air and the low-pressure center of the storm.
When the winds reach 74 miles per hour (119 km/h) or higher, the storm is then classified as a hurricane. The term "hurricane" is used in the Atlantic and northeastern Pacific, while the term "typhoon" is used in the western Pacific.
It's important to note that the wind speed is not the only criteria used to classify a tropical storm as a hurricane. The National Hurricane Center also takes into account other factors such as the storm's location, the minimum central pressure, and the organization of the storm's clouds.
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A tropical storm gets converted into a hurricane at a wind speed of 74 mph or more.
Tropical cyclones have a maximum speed of around 35 mph however hurricanes are defined as tropical cyclones exceeding the wind speed of 74 mph.
Hurricanes contain maximum surface sustained winds of speed 74 mph or above than this defined range.
When wind blows and it keeps on getting faster with every passing hour and finally at a point crosses the sustained limit of 74 mph or 119 kph that range of wind storm is defined generally as hurricanes.
Hence the classification is done not on the basis of storm size but on the basis of wind speed.
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he pond waters in a location in florida had an unusual taste and smell. investigations revealed that storm water runoffs had carried huge amounts of animal wastes into the pond waters. what are people in the location most likely to do to prevent the water pollution?
As you can find in the inquiry over, the surprising taste and smell of the waters of the tidal pond in an area in Florida, was the consequence of creature squandering brought to the tidal pond by spillover.
Surface spillover is the name given to the progression of water that can run on the outer layer of soil that is as of now splashed, in light of the fact that the water has not penetrated that dirt, causing an overflow.
Vegetation planting is ideal to keep spillover from happening. The presence of trees and bushes gives obstruction the progression of water and even permits the dirt to penetrate water all the more productively, forestalling waterlogging. In light of this, we can say that establishing trees and bushes would keep creature squander from coming into contact with the lake water, as well as forestalling soil disintegration.
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As you can see from the last investigation, spillage transported animal waste to a tidal pond in Florida, which is why the water there had an unusual flavor and smell.
Surface spillover is the term used to describe the progression of water that can flow on the top layer of already splattered soil because the water has not yet soaked through that dirt, leading to an overflow.
Planting vegetation is the best way to prevent spillage. The presence of trees and bushes prevents waterlogging by blocking the flow of water and even allowing dirt to more effectively permeate the water waterlogging. In light of this, we may conclude that planting trees and bushes would prevent soil erosion as well as the contact of animal waste with lake water.
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Cell division in bacterial and eukaryotic cells produces genetically _____ cells.
Answer:
Cell division in bacterial and eukaryotic cells produces: Genetically identical cells.
_______
Answer: identical
Explanation:
how can you include the five myplate food groups into your daily diet and describe each one?
The five MyPlate food groups are fruits, vegetables, grains, proteins, and dairy.
Including the five MyPlate food groups into my daily diet is very important for a balanced nutrition. Fruits provide a great source of vitamins and minerals, and can be eaten as a snack, or added to a meal for extra flavor.
Vegetables provide an essential source of many vitamins, minerals and antioxidants. It is recommended that you eat at least five servings of veggies each day. Whole grains provide essential dietary fiber, vitamins and minerals, and can be included in the form of bread, cereal, rice, and pasta.
Protein foods are important for growth and repair and can be found in meat, poultry, fish, eggs, nuts, and legumes. Finally, dairy foods provide a great source of calcium and vitamin D, which are essential for bone health. By including all five MyPlate food groups in my daily diet, I can ensure that I am getting all the essential nutrients needed for good health.
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Part B: Simulate Deforestation
Next, you’ll build a simulation showing the changes in a portion of the forest over time. This sample shows a forest region.
Forest Region
A 3 by 4 grid of rectangle blocks. 2 are black and 10 are gray.
Gray: untouched region (150 trees per block)
Black: deforested region (no surviving trees)
Use your word-processing program’s table maker to create three grids showing the rate of deforestation of a forest in three different years—year 1, year 5, and year 10. Choose colors to represent the deforested and untouched regions. Provide a key that shows the number of trees represented by each block, as well as the colors that represent the forested and deforested areas.
Here are the specifications for your forest:
The forest is represented by a 5 x 5 grid.
Year 1: There are a total of 4,500 trees in your forest and no deforestation. Figure out how many trees represent each block.
Year 5: 1,080 trees were deforested.
Year 10: An additional 1,980 trees were deforested.
After you’ve completed your grids, use the Insert Image button to insert screen shots of the grids in the answer space.
To facilitate human operations, deforestation is described as the extensive removal of trees from forests (or other places).
How is the deforestation test performed?In the modern world, there are numerous techniques to quantify deforestation. For instance, researchers can utilize satellite imaging and/or LiDAR to identify shifts in global forest growth and density.Reforestation is the process of reestablishing or replanting forests after they have been destroyed by fire or logging.To facilitate human operations, deforestation is described as the extensive removal of trees from forests (or other places). Since it may cause soil erosion, harm to natural ecosystems, disruptions to the water cycle, and loss of biodiversity, it is a severe environmental concern.To facilitate human operations, deforestation is described as the extensive removal of trees from forests (or other places).To learn more about deforestation refer to:
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do you think you can make a difference with your family or society? how?
Answer:
this is a opinion based question
Answer:
yes you can
Explanation:
you can lent a hand around your society and help those in need
which term names the total collection of dna in an organism? responses protein sequence protein sequence genetic modification genetic modification genome genome genotype
The entire nuclear DNA collection of an organism is referred to as its genome.
Humans and other sophisticated organisms also have a small quantity of DNA in cell structures called mitochondria, in addition to the DNA found in the nucleus.
The total collection of DNA instructions present in a cell makes up the genome. The human genome is made up of 23 pairs of chromosomes that are found in the cell's nucleus and one tiny chromosome that is found in the mitochondria. Everything a person needs to grow and operate is encoded in their genome.
All of an organism's genetic material is contained in its genome. Genes and other components that regulate the activity of those genes are contained in its DNA (or RNA in the case of some viruses).
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in the central dogma of biology, what part is transcription?
Answer:
Conversion of DNA into mRNA
Explanation:
Central Dogma was given by Fancis Crick .According to which information flows from DNA to mRNA to proteins.DNA to mRNA by process called transcription.mRNA to proteins by process called translation.Hope this helps!
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Text Version
Using the diagram above, answer the following questions:
True or False. The arrow labeled C represents a transfer of chemical energy to mechanical energy. Explain why this is true or false. False because it goes to chemical to thermal.
True or False. The arrow labeled A represents a transfer of solar energy to chemical energy. Explain why this is true or false. True because it goes from the sun which is thermal to the plant and that photosynthesis which is chemical.
Which arrow or arrows represent a release of carbon dioxide? What process is occurring at the arrow(s) you selected?
Which arrow or arrows indicate a process that cycles carbon from living or nonliving organisms? Describe the process or processes you selected.
Which arrow or arrows represent reactions that demonstrate a conservation of mass and energy? Explain your answer.
Answer:
the arrow that points into the ground represents conservation of mass energy bc that is where it is stored.
which method is used to infer the timing of branching events by using the fossil record or geologic events to calculate dna divergence rates?
The method is used to infer the timing of branching events by using the fossil record or geologic events to calculate dna divergence rates is the molecular clock
Evolution is a change in the body structure of living things that takes place slowly over a very long time. Evolution results in changes in shape for the better or more complex as a result of adaptation to the environment.
Molecular clock is a procedure in molecular evolution that uses comparisons of fossil developments to infer the history of geological drift of species. The molecular clock hypothesis states that DNA and protein sequences evolve at a relatively constant rate over time and among different organisms. It is used in the time span of evolution.
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I SWEAR LAST ONEE
A phospholipid is composed of all the following, except.
O a charged phosphate group
O a glycerol head
a fatty acid tails
O a polysaccharide nucleus
carbon, hydrogen, oxygen, & phosphorous
*
Answer:
Polar
Nonpolar
Phospholipid Head
Phospholipid tail
Phospholipid
Phospholipid Bilayer
Answer:
You're right. It's the last one.
Explanation:
Phospholipids consist of a glycerol molecule, two fatty acids, and a phosphate group that is modified by an alcohol. The phosphate group is the negatively-charged polar head, which is hydrophilic.
How does the body regulate the amount of carbon dioxide in the blood?
O it instructs the liver to absorb or release carbon dioxide by sending signals through the nervous system
O it controls the rate of breathing by sending signals through the nervous system
O it instructs the liver to absorb or release carbon dioxide by sending hormones through the blood
O it controls the rate of breathing by sending hormones through the blood
The blood's pH value drops as more carbon dioxide up in it .it controls the rate of breathing by sending hormones through the bloodthe brain controls how much carbon dioxide is exhaled (ventilation).
The correct answer is D
What does ventilation provide as a means of?The mechanical arrangement in a structure that introduces "fresh" external air and exhausts "contaminated" internal air is known as ventilation. Ventilation is utilized in the workplace to limit exposure with airborne contaminants.
Why is a patient ventilated?When you are unable to breathe on your own, ventilator is a sort of therapy that assists you or takes over for you. During operation or if your lung aren't functioning properly, you can be on a ventilator. oxygen is delivered, mechanical ventilation maintains your airways open, and
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Which option identifies how the farmer can best deal with the following scenario?
A farmer is presented with new neighbors from a recent development making accusations that the farm
presents an agricultural nuisance through its use of recommended high-yield farming techniques promoted by
the state agricultural experiment station and supported by the State Department of Agriculture.
O He can shift from the recommended techniques to a good stewardship philosophy to improve standards of farming.
He can point out the encroachment of residential development and argue for funds from the state to purchase new land and
move the farm.
He can shift from the IPM system in use to a pesticide-centered approach in an attempt to kill all pests associated with the
farm.
He can point out the use of GAAMP methods promoted by the state and argue that the farm's practices are covered by
Right to Farm.
In this case, the farmer's ideal course of action is: To raise farming standards, he can switch from the advised methods to a good stewardship philosophy.
What exactly is the stewardship ethos?
The ethical idea and practice of managing and caring for natural resources, such as land, water, and wildlife, is known as stewardship philosophy. In order to preserve or enhance the health and productivity of resources for future generations, a good stewardship philosophy emphasizes the significance of using them in a sustainable and responsible manner.
With this choice, the farmer can allay the worries of the new neighbors by displaying a dedication to ethical and sustainable farming methods.
If a farmer adopts a good stewardship philosophy, they can demonstrate that they are making efforts to reduce any
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can you please order them in order?
But this is not very courteous. You can use an introduction statement in place of an imperative. Here are a few typical alternatives to rephrasing an order.
Is please a request or an order?The English language uses the word "please" to denote respect and civility while making a request. The phrase "if you please" or "if it pleases you" was originally shortened, but due to the relationship between the people who use it and the intonation utilised, the phrase has developed significant nuance.Please is typically included after requests that begin with could, can, or would, but it is also acceptable to add it at the beginning or middle.When they precede an infinitive, both will typically have the same meaning in practice—they will open the door for the verb's stated action. However, the phrase "in order to" can emphasise how essential the subsequent action is.To learn more about typical refer to:
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7. compare a thin unmyelinated and thick myelinated cylinder of axon in terms of their membrane resistance, capacitance, and internal (axial resistance). what are the implications of each property on ap speed
By reducing the membrane capacitance, the propagation velocity can also be increased. You can do this by coating. Unmyelinated gaps around 2 m long are called nodular spaces (nodes of Ranvier).
We emphasise that voltage-gated sodium channels run the whole length of the membrane in unmyelinated axons. In contrast, voltage-gated sodium channels are only present in the nodal gaps of myelinated axons. Unmyelinated gaps around 2 m long are called nodular spaces (nodes of Ranvier). Axons with a larger diameter have a higher speed, allowing them to transmit impulses more quickly. This is due to the ion flow encountering less resistance. Nerve impulses in myelinated neurons leap over the myelin sheath instead of pass through it, shortening the path to the axon terminal, allowing them to transmit impulses more quickly than unmyelinated neurons. The myelin sheath has a high percentage of fatty molecules, which causes this to happen.
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The propagation velocity can also be boosted by decreasing the membrane capacitance. Coating can help you with this. Nodular spaces refer to 2 m-long unmyelinated gaps (nodes of Ranvier).
We emphasize that in unmyelinated axons, voltage-gated sodium channels extend the entire length of the membrane. Voltage-gated sodium channels, on the other hand, are only found in the nodal gaps of myelinated axons. Nodular spaces refer to 2 m-long unmyelinated gaps (nodes of Ranvier).
Larger axons move faster and can transfer impulses more quickly because of this. This is because there is less resistance to the ion flow. The journey to the axon terminal is shortened in myelinated neurons because nerve impulses jump over the myelin sheath rather than through it.
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Some scientist hypothesize that genetically engineering salmon to increase their size and the rate of growth can help meet human demands for protein. Which of these questions addresses the biggest concern scientist should research before releasing the genetically engineered salmon to the wild?
Some scientists hypothesize that genetically engineering salmon to increase their size and the rate of growth can help meet human demands for protein.
The conundrum of eating Genetically modified fish is that their primary moral arguments are condensed. There have been a number of questions raised against introduction of GM crops, including potential harm to human health, the environment, traditional farming practices and the "unnaturalness" of the technology.
Genetic engineering and selective breeding appears to incorporate the animals manipulation for human interests, such that they were nothing more than human property, rather than seeing them as having value in and of themselves, and this looks to be an apparent violation of animal rights.
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work to answer the following questions about the abo blood group system and blood type compatibility. can a person with blood type a successfully receive a transfusion from a person who has type o? why or why not?
A person with blood type A can successfully receive a transfusion from a person who has type O because a person having blood group O acts as universal blood donor .
What Is A universal blood donor ?The blood group type needed for urgent transfusions, The blood type that has the least chance of giving most recipients major side effects is O-negative blood. The universal blood donor type is a term that has been used to describe it in some instances. Antigens, which are proteins found on red blood cells, provide the basis for blood group kinds. Red blood cells are covered in both significant and minor antigens.
The (rhesus) Rh factor is used to categorize blood as well. Rh positivity results from having the Rh factor in your blood. You are Rh negative if your blood lacks the Rh factor. A perfect match in terms of type and Rh factor is required for blood transfusions. Even so, tiny amounts of the donor's and recipient's blood are combined for inspection.
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