Answer:
1. Acetylcholine binds to receptors on the motor end plate
2. Ligand-gated channels open leading to depolarization
3. End plate potential triggers an action potential
4. Transverse tubules convey action potentials into the interior of the muscle fiber
5. Calcium is released from the sarcoplasmic reticulum
6. Calcium ions bind to troponin, which then moves tropomyosin
Explanation:
Acetylcholine (ACh) is a signaling molecule (neurotransmitter) that binds to receptors on muscle cells. This binding triggers the opening of ligand-gated sodium channels, thereby ions enter into muscle cells, which causes the depolarization of the sarcolemma and thus promotes the release of Ca2+ ions from the sarcoplasmic reticulum. The myoneural junction, also known as the motor endplate, is the site of synaptic contact between a motor axon and a skeletal muscle fiber. The endplate potential is the voltage that produces the depolarization of muscle fibers when ACh molecules bind to their receptors in the cell membrane. This depolarization spreads in the sarcolemma through transverse tubules (T tubules) and thus generates an action potential. Finally, this action potential induces the release of Ca2+ in the sarcoplasmic reticulum, which activates troponin protein and induces muscle contraction.
Why do specialized plant cells lose their ability to divide
Answer:
The cells of permanent tissues do not divide. Cells derived from divisition of meristematic to see take up specific role and lose the ability to divide
Explanation:
Answer: In older years, many of the cells experience wear and tear. As a result, they lose their ability to divide or repair themselves.
Explanation: I hope this helps, may God bless you! :)
A balloon is filled with air. If the balloon is then left out in the sun and warms up, what do you expect to happen?
A. The balloon expands
B. The balloon contracts
C. The balloon stays the same size
Answer:
A: The balloon expands
Explanation:
Since the heat is absorbed by the balloon, the molecules inside will spread apart. When this happens, the balloon will also expand as the molecules expand which therefore the balloon grows.
Cell cycle is divided into two basic phases. What are they??
take 50 points
Which is a property of all unicellular organisms, but not all multicellular organisms?
New cells arise from other cells
DNA is contained in the cell nucleus
DNA is contained in the cytoplasm of cells.
Cells can survive independently of one another.
Answer:
New cells arise from other cells.
Explanation:
Can either be through budding or binary fission
in which process are fossils formed by the compression of dead organisms over time
Answer:
Carbonization
Explanation:
Name 1 body system (NOT the digestive
system) that your "fave" food can
impact.
How does your "fave" food impact the
body system you selected?
(Hint: These are the body systems we will
be learning about- Excretory, Nervous,
Muscular, Circulatory & Respiratory. You
can also include Integumentary & Skeletal
My favorite food is Buffalo Wings
Answer:
I'll use your favorite food.
Explanation:
Buffalo wings have protein since they have meat. Protein helps the body build muscle, so it impacts the muscular system.
how do you survive in mars
A marsupial mole has claws for burrowing, a keen sense of smell, and reduced vision in its eyes. The placental mole, a mammal on a
different branch of the mammalian evolutionary tree, has claws for burrowing, a keen sense of smell, and reduced vision in its eyes.
Which statement(s) describe the relationship between these two moles? Select ALL that apply.
A)
Convergent evolution occurred in these two mammalian species.
B)
These two species evolved under similar environmental pressures.
C)
These two species do not have a common ancestor, but evolved from
separate lineages.
D)
Identical mutations occurred within the two different lineages creating
identical phenotypes.
E)
These two species share a more recent common ancestor than they do with
other mammalian species.
Answer: a and b
Explanation:
i just took it
The relationship between these two mammalian species is that Convergent evolution occurred in these two mammalian species. That is option A.
What is Convergent evolution?Convergent evolution is the type of evolution where distantly related organisms evolve similar traits to adapt to similar environmental conditions.
The marsupial mole and the placental mole are distant species with similar features.
Therefore, the relationship between these two mammalian species is that Convergent evolution occurred in these two mammalian species.
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An organism's cientific name identifies the ______ and the _____ in which the organism belongs
Answer:
Genus, Species
Explanation:
Genus and Species, when combined, give you the scientific name of an organism. For example, humans are called h0mo sapiens. Our genus is h0mo and our species is sapiens. Hope this helps :)
What are the SECONDARY PRODUCER in the deep sea?
Answer: Hello, There! your Answers Are Below
in the ocean, algae, phytoplankton and kelp are producers
Explanation:
Hope this helps you!!
Have a great day!!!
If you Need More Help Just comment below My Answer And I can Get Back to you On Sunday or Monday.
The diagram below, best represents.
Answer:
B. An Ecosystem
Explanation:
A C and D do not fit the picture.
Once nutrients have been broken down through the process of cellular respiration, which of the following must also happen in order for an animal cell to maintain homeostasis?
The cell must take in sunlight.
The cell must remove wastes.
The cell must use up the energy molecules.
The cell must lower its operating temperature.
HELP PLEASE
hich term represents animals with backbones?
invertebrates
heterotrophs
autotrophs
vertebrates
Answer:
Vertebrates represents animals with backbones.
Answer:
D. Vertebrates
Explanation:
Question 42
1 pts
A man with type O blood has a child with a women who is tye AB. What is the probability
that they will have a child with type o blood?
O 100%
O 50%
O 0%
25%
State and discuss two types of immunity.
Answer:
How Does the Immune System Work?
Innate immunity: Everyone is born with innate (or natural) immunity, a type of general protection. ...
Adaptive immunity: Adaptive (or active) immunity develops throughout our lives. ...
Passive immunity: Passive immunity is "borrowed" from another source and it lasts for a short time.
please help me with this
Answer:
Question 13 : Ureter
Question 14 : Ovulation
Explanation:
..........................
Answer:
the answer is ovulation
This diagram shows a red blood cell in a beaker that contains a solution with a
higher salt concentration than that inside the red blood cell.
high salt concentration
low salt concentration
What will happen to the red blood cell in this environment?
A. The size of the red blood cell will remain constant.
B. The red blood cell will swell at first and then shrink.
C. The red blood cell will swell from absorbing salt molecules.
D. The red blood cell will shrink from losing water molecules
Answer:
3. D. The red blood cell will shrink from losing water molecules
59. C. Glucose + Oxygen —> Carbon dioxide + Water
Explanation:
The red blood cell has a lower salt concentration than the liquid which means that it has a higher water concentration than the liquid.
By the process of osmosis, water will flow from the red blood cell to the liquid which would lead to the red blood cell shrinking in size.
Cellular respiration is used to create energy for cells. It works by burning glucose in the presence of oxygen. The result is an outburst of energy and CO2 as well as water.
Which of the following is NOT an example of a pre-zygotic barrier?
behavioral isolation
hybrid sterility
habitat isolation,
mechanical isolation
Answer:
isolating mechanisms The reproductive characteristics which prevent species from fusing. Individuals mate in their preferred habitat, and therefore do not meet individuals of other Genomic incompatibility, hybrid inevitability or sterility. show that there is little behavioural, mechanical, or post-mating isolation
Explanation:
i hope all help full
Which of the following is true about pea
plants?
A. They produce a small number of offspring.
B. They produce asexually.
C. Their female parts can be artificially pollinated.
D. They don't have many contrasting characters.
The statement true about pea plant are as,
They produce a small number of offspring.Their female parts can be artificially pollinated.What is artificial pollination?The pollination which is carried by human is called artificial pollination.It is used to pollinate plants when natural pollination is insufficient and undesirable.The artificial pollination consider as mechanical technique.There is no requirement of insect and weather.The example of plant in which artificial pollination can occur is kiwifruit.To learn more about artificial pollination here.
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If a pet has to survive without your care, how would its diet change? Write your ideas on the lines below. Read about how organisms get food and energy in their environment
Answer:
rather than consuming "pet food" that contains all proper nutrients required your pet would being to scavenge for food wherever they could find it. Survival instincts would kick in and they would eat whatever they could find. Depending on food availability, loss of muscle mass is a possibility.
Explanation:
If my pet is to survive without me, its diet will change. First of all, he will not get food, so how is it possible for a living being to survive without food. It will get skinny and starve to death after a few days.
What is Diet?Diet is defined as the sum of food that is consumed by a person or other organism. The term diet refers to the use of a specific intake of nutrition for health or weight-management reasons. Humans are omnivores so, every culture and every individual has some food preferences or some food taboos.
It is essential for good health and nutrition protects you from many chronic non-communicable diseases like heart disease, diabetes and cancer. Eating a variety of foods and consuming less salt, sugar, and saturated and industrially produced trans-fats are important for a healthy diet.
Thus, if my pet is to survive without me, its diet will change. First of all, he will not get food, so how is it possible for a living being to survive without food. It will get skinny and starve to death after a few days.
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You want to build a house in an area with a maximum amount of species diversity. For building the house you have to clear up to 3/4th of the forest cover. How do you think this will affect the water runoff?
Answer:
The runoff will increases.
Explanation:
The runoff will be adversely affected if the 3/4th of the forest cover is removed because forest cover lowers the intensity of runoff by absorbing most of the water. The construction of house will increase the runoff due to little vegetative cover for the absorption of water and more water will runoff on the surface that will leads to flood condition in the lower elevated region of that area. The vegetative cover of the forest helps in preventing the flood condition by absorbing the runoff water.
Para que sirve el estomago?
Answer:
Órgano que forma parte del aparato digestivo. El estómago ayuda a digerir los alimentos al mezclarlos con jugos digestivos convirtiéndolos en líquido diluido.
of the uterus.
The start of pregnancy occurs when the blastocyst embeds in the
-lcorpus luteum
-endometrium
-fimbriae
-follicle
Fruiting Bodies of Fungi The recognizable forms of fungal reproductive bodies, or fruiting bodies, encountered in nature vary structurally. Common forms of fungal fruiting bodies include trumpet, club fungus, bracket, cup fungus, gill fungus, bolete, puff ball, and stinkhorn. Close observation of fruiting body anatomy can lend clues during identification of a species. Differing species of fungi can appear similar, and it is never advised to eat a wild mushroom because poisonous varieties can resemble edible ones.
1. Fungal fruiting bodies, or reproductive bodies, have different structural forms.
a. true
b. false
2. Many experiments require student-supplied items, such as _____.
Answer to Question 1:
True
Explanation
As indicated in the passage, fruiting bodies of fungi differ structurally. However, different species can appear to be similar and often misleading thus creating the risk of food poisoning.
Question 2:
Many experiments require student-supplied items, such as _____.
1. Chicken
2. Fresh flowers
3. Distilled water
4. All of the Above.
Answer to Question 2:
The correct answer is 3.
Explanation
Water comes in varying degrees of purity. When water that contains other substrates or impurities is used for an experiment, it distorts the results and creates errors. So the scientist's ability to determine the root of a problem becomes enervated.
Using distilled water impurities removes the possibility of such an error. Distilled water is also used for cleaning laboratory equipment.
Cheers
Select the statement below that describes a critical finding of the Franklin DNA diffraction experiment. Group of answer choices That the phosphate groups are stabilized by the presence of divalent metals in solution That base stacking is the primary force holding the DNA helix together That B-form DNA helices have a pitch of approximately 34 angstroms That the DNA bases are predominantly found in their keto form That the number of adenine residues is always equal to the number of thymine residues in a double stranded DNA molecule
Answer:
That B-form DNA helices have a pitch of approximately 34 angstroms
Explanation:
Rosalind Franklin was an X-ray crystallographer whose work contributed to the discovery of the molecular structure of DNA molecule by Watson and Crick. B-form DNA is the most common form of DNA, which consists of a right-handed double helix. B-form DNA was discovered by Watson and Crick based on the X-ray diffraction image of DNA (popularly known as image 51) obtained by Franklin. The pitch refers to the distance after every 10 base pairs along the DNA helix for one complete double-helix turn. This distance in the B-DNA helix is 34 Ångströms (i.e., 3.4 nanometers).
m/forms/d/e/1FAIpQLSf1siktOoZRkggNo-AzHPw62091WglmEyyJt30t8yy3LbzpVQ/viewform
15. When two similar unicellular organisms fuse and exchange nuclear materials,
it is known as
O A. Haploidy
B. Conjugation
O .
C. Meiosis
D. Nuclear growth
Drag each label to the correct location on the table. Sort the observations based on whether they are quantitative or qualitative.
Answer:
Qualitative observations are those that cannot really be counted or measured by empirical figures, but are rather described by the features they have such as their color or taste.
Quantitative observations can be measured and counted by empirical figures i.e. numbers such as age and temperature. Number operations such as addition can be performed on them as well.
Qualitative observations.
The shirt is soft and red.The river flows more quickly in the spring than in the summer.Quantitative observations.
There are eight elephants over the age of six at the zoo. It is 72 degrees Fahrenheit outside.Answer:
Quantitative observation:
There are eight elephants over the age of six at the zoo.
It is 72 degrees Fahrenheit outside.
Qualitative observation:-
The shirt is soft and red.
The river flows more quickly in the spring than in the summer.
Why does oxygen decrease the rate of photosynthesis?
Which of the following best explains the evolutionary basis of human skin color? two parents who are heterozygous for each of the alleles have a greater probability of having a child with medium skin than one with very light or very dark skin in a diverse population, the distribution of the trait will be a bell curve, so most people will fall in the middle the inheritance of the alleles from each parent is completely random but in a population there may be natural selective pressure from the environment to favor different levels of expression multiple genes and multiple alleles each have an additive effect on how intensely the trait is expressed.
Answer:
From the given Options, Option C is correct.
the inheritance of the alleles from each parent is completely random but in a population, there may be natural selective pressure from the environment to favor different levels of expression
Explanation:
The evolutionary basis of human skin color stems far back to the genetic mutations involved in skin pigmentation. Although the diversity of skin color is a characteristic trait of humans, These variants and their evolution reveal that the history of skin color is much older than previously thought.
The evolution of various variations in the human skin color is a result of selective forces which is an environmental factor that favors various levels of expression. Thus, the best option that explains the basis of human skin color in terms of evolutionary trend is Option C.
What are the four kinds of acid precipitation ?