Answer:
The Central Nervous system is made up of the brain,the control units,and the spinal cord ,the network of nerves ,which feed the brain with sensory information for processing.The entire CNS is lined by a constantly circulating fluid called the Cerebrospinal Fluid.(CSF).
Together with the Peripheral Nervous system,the CNS ensure coordination of the body activities.
Generally both the brain and the spinal cord are protected by the skull and vertebral column respectively. Their activities are based on the million of neurons which are networked by synapses.
Functions are:
processing information that is received from the stimuli receptors
sending out information so that the body can react appropriately to stimuli
coordinating reflexes and reactions to stimuli.
These functions are performed through the fast reflex pathways, for efficient coordination of the systems of the body by the CNS with PNS
Explanation:
Choose the incorrect statement regarding how the nervous system coordinates homeostasis in the body. Multiple Choice Through sense organs and simple sensory nerve endings, the nervous system receives information about changes in the body and the external environment and transmits coded messages to the spinal cord and brain. The spinal cord and brain process information without regard to past experiences, and determine what response, if any, is appropriate to the circumstances.
Answer:
Both
Explanation:
The Nervous system is the seat of coordination. It receives information from the environment via sensation(Homeostasis) and respond back to the sensation. It helps process pain, touch, pressure.
Hypothalamus is a part of the brain that regulated homeostasis. it helps to regulate the taste, body temperature and aids water balance in the body.
At your laboratory you are observing skin cells labeled 'defective' to determine what is wrong with them. After careful observation you notice that the cytoskeleton is there, but the cell is still having trouble maintaining its shape. Infer what could be damaged.
A. Cell wall
B. Capsule
C. Cilia
D. Actin filaments
Answer:
D. Actin Filaments
Explanation:
Actin filaments are part of cytoskeleton and they are the central key player in maintaining cell shape and movement. So my guess is that since cytoskeleton is present, there is something likely wrong with the actin filament.
Even in the presence of the cytoskeleton, the shape is not maintained in the cell due to the damaged actin filaments. Thus, option D is correct.
What are actin filaments?Actin filaments are the part of the cytoskeleton that forms bundles and meshworks to provide the cell shape and structure. They are the central part of the cell shape and motion.
As the cytoskeleton is present then, there is the possibility that the actin filaments of the cells are damaged so that the cell is not able to maintain the cell shape.
Cell wall, capsules, and cilia have no role in the animal cell like the skin cells to maintain the cell shape as animal lacks cell wall in the structure and are not involved in providing cell shape.
Therefore, the actin filament is damaged.
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which organsms can produce the highest number of geneticallly different gametes
Answer:
A Carp and Giraffes
A cross section is taken from a dorsal root ganglion. Upon observation, it is noted that the section is full of cell bodies. These cell bodies belong to what order of neuron?
a. first
b. second
c. third
d. It could be any of these options.
Answer:
Option a
Explanation:
The first order neurons are also termed sensory neurons. The dorsal root ganglion is made up of cell bodies of sensory neurons which possess axon that help in the relay of information to the central nervous system mainly the spinal cord.
Which kind of body tissue lines the oral cavity?
Answer:Oral Mucosae
Explanation:This is because the oral mucosae is the type of body tissue that lines up with the oral cavity.
2. What are fraternal twins, and how do they normally occur?
Answer:
hey!
I think your answer is
They dvelop from 2 separate eggs
Fraternal twins each come from their own egg and sperm. The term for this is dizygotic , while identical twins are monozygotic.
Explanation:
hope this helps
a gene may be discribed as
Answer: A gene can be defined as the functional segment of DNA where it is the unit of hereditary of the characteristics of the parents to the offspring
Which two types of structures make up the earthworm's heart?
A. Organ systems
B. Specialized cells
C. Tissues
D. Organisms
Answer: Option A and B.
Organ system and tissues.
Explanation:
Earthworm is a segmented worm that belong to the phylum annelids. Earthworm has a close circulatory system just as human beings which means their blood circulate through a closed network of vessels which are connective tissues. Earthworm has a structure of 5 hearts and they are called aortic arches which are organ systems. These pump blood into network of vessels and it's flow through the body. From there, the blood move to dorsal blood vessel which send blood to the front of the Earthworm, then to the ventral blood vessel which send blood to the posterior. At the intestines, there are lateral vessels which carry nutrients away from the gut and to the body.
Answer:
A & D
Explanation:
Which represents the greatest time frame in which a short-term environmental change can occur?
in days
in minutes
over hundreds of years
over thousands of years
Answer:
Over hundreds of years
Explanation:
Environmental changes occur as a result of human action and natural processes. These changes leads to the disruption in the normal environmental processes. Examples of human actions include release of pollutants into the atmosphere, overcrowding and destroy of plants and animals habitats etc while the natural causes include earthquakes and the end results include climate changes.
The greatest time frame in which a short-term environmental change can occur is over hundred of years as environmental changes are normally known to occur after several thousands and millions of years.
Answer:
over hundreds of years
Explanation:
Thiobacillus denitrificans is a species of bacteria that obtains its energy from carbon dioxide and inorganic compounds such as nitrogen in its environment. It is used in bioremediation (natural cleansing) of groundwater that contains excess nitrate, allowing the nitrates to be removed. Through what process does Thiobacillus denitrificans help bioremediate groundwater? nitrification denitrification nitrogen fixation decomposition
denitrification
Explanation:
Thiobacillus denitrificans are denitrifying bacteria
Answer:
B. denitrification
Explanation:
Just to the test gang 100%
Based on its shape what is most likely the form of bacteria
A.) coccus
B.)Staphus
C.)bacillus
D.) spirillum
Answer:
C.)bacillus
Explanation:
Round bacteria is called cocci (singular: coccus), cylindrical, capsule-shaped ones known as bacilli (singular: bacillus); comma shaped called vibro(eg: vibro cholerae) and spiral bacteria, aptly called spirilla (singular: spirillum).
Hope it helps.
Option (C.) bacillus when a bacteria is referred to as a bacillus, it means it has a rod-shaped morphology. This shape allows them to move efficiently and attach various appendages for movement and other functions.
The term "bacillus" refers to a specific shape of bacteria. Bacillus bacteria are rod-shaped, meaning they are elongated and cylindrical in form. They typically have a length that is greater than their width.
When we talk about the shape of bacteria, it's important to note that bacteria can come in various shapes, such as cocci (spherical), spirilla (spiral), and vibrio (comma-shaped). However, based on its name, bacillus bacteria are characterized by their rod-like shape.
To further understand this concept, imagine a tiny cylinder or a straight rod. That's how bacillus bacteria would look under a microscope. This shape allows them to move and navigate through their environment efficiently. Additionally, the rod-like structure provides a large surface area for the attachment of appendages like flagella, which aids in their movement.
It's worth noting that while the term "bacillus" refers to a specific shape of bacteria, there are many different species of bacillus bacteria that can vary in their characteristics and behaviors. Some examples include Bacillus subtilis and Bacillus cereus, which have different roles in nature and may exhibit distinct behaviors.
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Fill in the blanks with appropriate wods.
1. A process called__________ helps to propel first the bolus and then chyme forward through the esophagus, stomach, and small intestine.
2. Nutrients are absorbed through the lining of the small intestine via a variety of mechanisms. Most nutrients require______________ , where a specific carrier protein is utilized, but no energy is required.
3. Some smaller molecules can cross via_____________ , Like with facilitated diffusion, no energy is required because the concentration of a nutrient is higher inside the GI tract than in the enterocyte. Unlike with facilitated diffusion, however, no ____________ is needed.
4. Nutrients like glucose and amino acids are absorbed through ______________ , which requires both a carrier protein and energy in the form of ATP.
5. A fourth method is called _____________ , which involves a vesicle that forms from the enterocyte's cell membrane, engulfing the nutrient and then drawing the nutrient into the cell.
6. Once absorbed, water-soluble nutrients like carbohydrates and amino acids enter capillaries and travel to the liver via the ___________ .
7. Fat-soluble nutrients initially travel via the _____________ before entering the bloodstream.
8. Most water is absorbed in the _____________ , and solid waste is then eliminated.
a. Large intestine
b. Peristalsis
c. Passive diffusion
d. Carrier protein
e. Active transport
f. Facilitated diffusion
g. Endocytosis
h. Lymphatic system
i. Hepatic portal vein
Answer:
1. b. Peristalsis
2. c. Passive diffusion
3. Facilitated diffusion, d. Carrier protein
4. e. Active transport
5. g. Endocytosis
6. i. Hepatic portal vein
7. h. Lymphatic system
8. a. Large intestine
Explanation:
1. peristalsis helps to propel first the bolus and then chyme forward through the esophagus, stomach, and small intestine.
2. Nutrients are absorbed through the lining of the small intestine via a variety of mechanisms. Most nutrients require passive diffusion, where a specific carrier protein is utilized, but no energy is required.
3. Some smaller molecules can cross via facilitated diffusion Like with facilitated diffusion, no energy is required because the concentration of a nutrient is higher inside the GI tract than in the enterocyte. Unlike with facilitated diffusion, however, no carrier protein is needed.
4. Nutrients like glucose and amino acids are absorbed through active transport which requires both a carrier protein and energy in the form of ATP.
5. A fourth method is called endocytosis which involves a vesicle that forms from the enterocyte's cell membrane, engulfing the nutrient and then drawing the nutrient into the cell.
6. Once absorbed, water-soluble nutrients like carbohydrates and amino acids enter capillaries and travel to the liver via the hepatic system
7. The lymphatic system helps in traveling of the Fat-soluble nutrients initially, before entering the bloodstream.
8. Most water is absorbed and solid waste is then eliminated. in the large intestine
Select all of the answers that apply. Besides lava setting fire to combustible materials, what other natural hazards can occur from a volcanic eruption?
Answer:
earthquakes
landslide and mudslides
flooding
"During the process of nerve impulse transmission, when sodium flows into the neuron, its cell membrane is"
Answer:
The neuron cell membrane is partially permeable to sodium ions, so sodium atoms slowly leak into the neuron through sodium leakage channels. The cell wants to maintain a negative resting membrane potential, so it has a pump that pumps potassium back into the cell and pumps sodium out of the cell at the same time.
During the process of nerve impulse transmission, when sodium flows into the neuron, its cell membrane is depolarized.
The nerve impulse is an electrical impulse, so that the electrical impulse is transmitted, the positive sodium ions that are present outside the neuron in a state of rest must pass through the cell membrane.
In a state of rest, the interior of the neuron has a negative electrical charge (repolarized membrane).
When positive sodium ions enter the neuron, they change the internal charge from negative to positive (depolarized membrane).
This increase is due to the constant number of sodium ions, positively charged, inside the membrane of the neuron.
This depolarization is the first step in the generation of an action potential, that is, the emission of a message.
In other words, it is the part of the process that causes an electrical signal to be released, which will end up traveling through the neuron to cause the transmission of information through the nervous system.
Therefore, we can conclude that during the process of nerve impulse transmission, when sodium flows into the neuron, its cell membrane is depolarized.
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What can develop in the uterus?
Fibroids are abnormal growths that develop in or on a woman's uterus. Sometimes these tumors become quite large and cause severe abdominal pain and heavy periods. In other cases, they cause no signs or symptoms at all. The growths are typically benign, or noncancerous.
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Question 1 (5 points)
Write a biconditional statement for the following conditional statement.
If n is an even number, then it's divisible by 2.
If n is divisible by 2, then it's an even number.
If n isn't an even number, then it's not divisible by 2.
nis an even number if and only if it's divisible by 2.
2
If n is an even number, then it's not divisible by 2.
Answer:
n is an even number if and only if it's divisible by 2.
Explanation:
Biconditional statement is a type of statement which is only written when the both segments of the sentence are true. For writing biconditional statement, ''if and only if'' words should be used. For example, the two sides of the triangle are same if and only if both have same length. The biconditional statement considered as true if both the segments are true in nature. Symbolically, it is denoted by double arrows between two symbols.
Describe the invasion of wild parsnip, including the harm it causes
Answer:
poisonus
Explanation:
Answer:
came from Europe and Asia
invaded the entire state of Wisconsin
can burn your skin
reproduces rapidly
can be removed at root or with a powered brush cutter for large populations
Explanation:
Sorry that it is late, but this is the Edge version.
How many sperm cells are needed for one double fertilization event in angiosperms? How many eggs are fertilized?
A farmer plants Bt cotton that is genetically modified to produce its own insecticide. Of the cotton bollworms feeding on these Bt plants, only 5% survive unless they have at least one copy of the dominant resistance allele R that confers resistance to the Bt insecticide. When the farmer first plants Bt cotton, the frequency of the R allele in the cotton bollworm population is 0.01. What will the frequency of the resistance allele be after one generation of cotton bollworms fed on Bt cotton [answer]
Answer:
the frequency of the resistant allele after one generation is 0.989
Explanation:
Given that :
A farmer plants Bt cotton that is genetically modified to produce its own insecticide.
Of the cotton bollworms feeding on these Bt plants, only 5% survive
i.e the survival rate s = 5% =0.05
unless they have at least one copy of the dominant resistance allele R that confers resistance to the Bt insecticide
Frequency of R allele = 0.01
In order to determine what will the frequency of the resistance allele be after one generation of cotton bollworms fed on Bt cotton; we need to first determine the frequency of the recessive allele r.
According to Hardy-Weinberg Equilibrium ;
p+q = 1
Let p = R and q = r
R + r = 1
0.01 + r = 1
r = 1 - 0.01
r = 0.99
Now; the frequency of the resistance allele after one generation can be calculated as :
[tex]q' = \dfrac{q(1-sq)}{1-(sq^2)}[/tex]
where ;
q' = R
q = r
[tex]q' = \dfrac{0.99(1-(0.05 \times 0.99))}{1-(0.05 \times 0.99^2)}[/tex]
[tex]q' = \dfrac{0.99(0.9505)}{1-(0.049005)}[/tex]
[tex]q' = \dfrac{0.940995}{0.950995}[/tex]
q' = 0.989
Thus; the frequency of the resistant allele after one generation is 0.989
Which combination forms a covalent bond?
A. Two carbon atoms
B. Two oxygen molecules
C. Two water molecules
D. Two sodium atoms
SUSMIT
!!!
Answer:
A. Two carbon atoms
Explanation:
We know that covalent bond occurs when there are two non - metallic atoms and carbon atoms are non-metallic so it is the answer.
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According to Sam's soap recipe, she needs 945 grams of coconut oil. To measure out the coconut oil, Sam first places a liquid measuring cup on a kitchen scale and sets the scale to 0 grams. She then pours coconut oil into the cup until the scale reads 945 grams. She notes that the total volume of the 945 grams of coconut oil is 1.05 liters.
The question is incomplete, however, the question is asking about the density of coconut oil by the given data
Answer:
The correct answer is - d = 0.9402
Explanation:
Given:
mass of the coconut oil in cup = 945 gm
the volume of coconut oil in cup = 1.05 liter
solution:
we know that,
volume × density = mass
then, 1.05 × d = 945
d = 945/1005 (converting the liter value to ml)
d = 0.9402 (at room temperature)
The correct answer is - d = 0.9402
What is the probability the offspring will be heterozygous for this trait?
25%
50%
75%
100%
Answer:
50%
Explanation:
for a child Aa is 50%
Which phase best descibes the rocks texture? Jagged grains, course grains, rounded grains, non banded grains.
Question 22 (5 points)
The major difference between B cells and T cells is that
T cells do not produce antibodies.
B cells do not produce antibodies.
B cells always circulate in the blood stream.
T cells always circulate in the blood stream.
Answer:
B cells always circulate in the blood stream
Explanation:
just took test pf.
"While bird watching, Carl hypothesized he could identify 73 different types of birds in one day. He actually identified 65 different types of birds. What was his percent error
Answer:
15.87%
Explanation:
Carl's percentage error would be 15.87%.
From the data, the hypothesized number of birds Carl could identify is 73.
The actual number of birds he was able to identify is 63.
The margin of error between the two = 73 - 63 = 10.
Hence, percentage error = error/true measurement x 100%
= 10/63 x 100% = 15.87%
How can we determine the population of soil?
Answer:
by the depth of the soil
In an experiment, the membrane potential of a neuron is hyperpolarized to –120 mV. When an inhibitory neurotransmitter is applied to the preparation, the membrane is depolarized. Which of the following could explain this result?
a. Inhibitory transmitters normally depolarize the synaptic membrane.
b. The normal response of the postsynaptic membrane to any transmitter is depolarization.
c. The inhibitory transmitter activates ligand-gated potassium channels.
d. Sodium channels become inactivated.
e. Calcium channels become activated.
Answer:
The inhibitory transmitter activates ligand-gated potassium channels
Explanation:
When a cell is in hyperpolarized state,the potassium gated channels are taken longer time to close up, Therefore, more K+ leaks out of the axoplasm to the exterior.Therefore the cell appears to continue in the resting state, with more negative value of the cell potential of (-120 mV) and this called hyperpolarization.
However, with the addition of inhibitory transmitter,the ligand-gated potassium channels are activated,Theses channels closes up.Then sodium gated channels, which were initially in refractive state reopens, sodium ions diffuses inwards for depolarization, and the neuron returns to depolarized state.
why might rainforests in South America and near the equator be so productive?
Due to the abundant sunlight,
Suitable temperature
Excessive rainfall on a daily basis leads to flirtatious turnover of nutrients and plant growth is prompt.
avier stepped on a splinter while walking barefoot. The splinter pierced deep into his foot and caused a great amount of pain. What is the appropriate pathway of pain sensation from the spinal cord into the brain
Answer:
Answered below
Explanation:
On piercing his foot, the pain receptors called nociceptors, found in the skin, are activated. Nociceptors exist at the nerve endings of the primary afferent neurons. Signals travel along the first order neurons which have cell bodies within the dorsal root ganglia of the spinal cord. In the dorsal root ganglia, the signals are taken up at the synapse with the second order neurons which have cell bodies in the nuclei of the cranial nerves within the brainstem. These neurons ascend cranially in the spinothalamic tract to the thalamus. The third order neurons lie within the ventral posterolateral nucleus of the thalamus. They terminate at the somatosensory cortex where the signals are being processed and returned as a sensation of pain.
DNA damage checkpoints are crucial for preventing cell proliferation when DNA damage has occurred. The role of DNA checkpoint proteins in the cell cycle is closely tied to the roles of DNA repair enzymes, although these proteins perform different functions.1. Which of the following statements is true for DNA checkpoint proteins and not for DNA repair enzymes? a. These proteins remove a single nucleotide of damaged DNA. b. These proteins nick the phosphodiester backbone of the damaged DNA. c. These proteins prevent the cell cycle from progressing if damaged DNA is detected. d. These proteins remove the region of damaged DNA. 2. Which cell cycle phases contain critical DNA damage checkpoints?a. Gob. G1c. G2d. M
Answer:
1. C. These proteins prevent the cell cycle from progressing if damaged DNA is detected.
2. C. G2
Explanation:
1. All other choices apply uniquely to DNA repair enzymes (i.e. not to DNA checkpoint proteins).
2. Go doesn't contain any critical DNA damage checkpts. because it's not even an official part of the cell cycle; it's simply a phase in which cells are arrested. G1 doesn't contain any critical DNA damage checkpts. because it's before DNA is replicated. G2 is right after S phase when the DNA is replicated; thus, it contains critical DNA damage checkpts.