What would be the effect of ACh binding to its receptor on a skeletal muscle cell?
a. Na+ would flow into the cell, and K+ would flow out of the cell.
b. Na+ would flow out of the cell, and K+ would flow into the cell.
c. Ca2+ would flow out of the cell, and Na+ would flow into the cell.
d. Ca2+ would flow into the cell, and Na+ would flow out of the cell.
Answers
Option A) Na+ would flow into the cell, and K+ would flow out of the cell, would be the effect of ACh binding to its receptor on a skeletal muscle cell.
According to electron microscopy research, the postsynaptic membrane is a specific structure with a high degree of folding (De Harven and Coers, 1959). Motor nerve terminals are lodged in a gutter or main cleft in the muscle. There are also secondary junctional folds, which are invaginations of the muscular membrane that extend into the sarcoplasm. They enhance the overall surface of the postsynaptic membrane, and AChRs are densely concentrated on the crests of these folds, adjacent to the presynaptic active zones. Voltage-gated Na+ channels are clustered at the folds' bases to enhance postsynaptic membrane excitability.
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Complete Question is:
What would be the effect of ACh binding to its receptor on the postsynaptic muscle cell?
A.) Ca2+ would leak out of the cell as Na+ flowed into the cell.
B.) Ca2+ would flow into the cell as Na+ flowed out of the cell.
C.) Na+ would flow into the cell and K+ would flow out of the cell.
D.) Only Na+ would flow into the cell.
Related Questions
microtubules start at the centrosome and then connect to the kinetochores, which are structures at the central region of chromosomes
Answers
Microtubules start at the centrosome and then connect to the kinetochores, which are structures at the central region of chromosomes. The centrosome is the main microtubule-organizing center (MTOC) in most animal cells, whereas plant cells lack a typical centrosome.
The two spindle poles are the central region of a chromosome where a kinetochore is connected. Microtubules are a type of cytoskeletal protein filament that plays a crucial role in the mechanics of cell division.
Microtubules, together with actin and intermediate filaments, form the cytoskeleton, which is the structural framework of the cell. Microtubules also transport vesicles and organelles, support cell shape, and mediate cell signaling.
They are also crucial in cell division, serving as a framework for the mitotic spindle, a structure that segregates chromosomes during cell division.
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Identify the characteristic of life for the following statement below1. ____________________”My friend got 3 inches taller in one summer”
Answers
In this statement, the characteristic of life is growth, i.e the increase in number and size of cells.
Cells from different parts of an organism have varying
and
Answers
The study of the cell is called cell biology. There are two types of cells on the basis of the number and these are unicellular and multicellular.
The question is incomplete. kindly provide the full question so that we can able to assist you.
What is cell division?The formation of new cells from the preexisting cell is called cell divisionThe number of the chromosome may or may not be the same as compared to the parent cellHence, kindly provide the proper information.
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Prove the Flood a written in Genei through the ue of cientific evidence - example, rock formation
Answers
Scientific evidence such as geology, geochronology, and paleontology contradicts the idea of a global flood as described in the bible.
Additionally, the lack of geological evidence for a massive flood event that would have been necessary to cover the entire earth casts further doubt on the idea.
While some may interpret certain rock formations as evidence of a flood, these interpretations are not supported by the scientific community and are considered to be more of a religious belief rather than a scientific conclusion.
Scientific evidence, including rock formations and the fossil record, does not support a worldwide flood as described in the Bible. The scientific community generally views the story of the flood as a myth or allegory, rather than a historical event.
Complete question:
Prove the Flood a written in Genei through the use of scientific evidence - for example, rock formation
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If you wanted to stay 20 feet below the surface of the water, what kind of buoyancy would you need to have? Positive, Negative or Neutral?
Answers
Answer:
It depends what kind of water.
Explanation:
Salt water:
You would need a negative buoyancy.
Fresh water:
You would need a neutral buoyancy.
Please let me know if I am wrong!
Buoyancy is the tendency of an object to float at the upper surface of the fluid due to upwards force. If the diver wants to stay below the water surface then they will need negative buoyancy.
What is buoyancy?Buoyancy has been defined by the upthrust experienced by an object in a fluid or liquid medium. It is a force that opposes or counters the weight of the object. Buoyancy can be positive, neutral, or negative. Positive buoyancy makes object float.
A negative buoyancy occurs when the object has more mass and density than the fluid so that the applied force makes them sink. So, if a person wants to stay 20 feet below the surface of the water then negative buoyancy has to take place.
Therefore, negative buoyancy will make a person stay at the bottom of the water.
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The chemical energy supply for all living cells is contained in a molecule that, when broken down, releases the energy so that it may be used for activities such as muscle contractions, photosynthesis, and locomotion. This molecule that is a storehouse of energy is
A.DNA
B.RNA
C.enzymes
D.ATP
Answers
Answer:
C
Explanation:
In addition to promoting glucose uptake into cells, insulin Group of answer choices promotes triglyceride storage during times of energy excess. promotes lipolysis. promotes beta-oxidation. promotes ketogenesis.
Answers
The excess amount of insulin is used to promoting triglyceride storage during times of energy excess. promotes lipolysis. promotes beta-oxidation. promotes ketogenesis.
In addition to promoting glucose uptake into cells, insulin promotes triglyceride storage during times of energy excess.Insulin is a peptide hormone produced by beta cells of the pancreatic islets.
The hormone promotes glucose uptake into cells, reduces blood glucose levels, and helps to store nutrients after meals when energy intake exceeds energy demand. This process is known as anabolic metabolism and is characterized by increased lipid storage, glycogen synthesis, and protein synthesis.
When glucose is abundant and insulin levels are elevated, glucose uptake is stimulated in adipose tissue, and the fatty acids are esterified to glycerol to form triglycerides. Hence, in addition to promoting glucose uptake into cells, insulin promotes triglyceride storage during times of energy excess. Therefore, the correct answer is option A, "promotes triglyceride storage during times of energy excess."
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When an insect touches the bristles on the lobes of a Venus flytrap, the lobes close quickly, engulfing the insect. The movement of the insect inside the lobes causes the flytrap to secrete digestive enzymes that kill the insect. Which type of relationship does this describe?
competition
parasitism
predation
commensalism
Answers
The type of relationship that describes this kind of ecological interaction is known as predation (Option C).
What is predation?Predation is a type of ecological relationship where one species is benefited whereas the other is harmed.
The species that is benefited from this interaction (predation) is called the predator, whereas the species harmed is the prey.
In conclusion, the type of relationship that describes this ecological interaction is predation.
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Answer:
C
Explanation:
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Answers
Answer:
ok so how grass grows and how we all know how it grows but, when its in the shade and with barely any light it starts to bend towards the sun to try and find the sun , like bananas they are curved because that's where the sun it at they curver towards the sun and that's what the grass is doing its turning itself towards the sun trying to find the sunlight
Explanation:
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Please fill in!!
a. ATP
b. Light energy
C. C02
d. 02
e. Carbohydrate
f. Water
Would greatly appreciate if you answered like this:
18: ATP
19: etc..
Answers
18. b
19. c
20. f
21. e
22. d
23. c
24. f
25. a
It is believed that weed killers like 2,4-D and 2,4,5-T may
work by stimulating cell division. Why would the stimulation
of cell division make these chemicals effective weed killers?
Answers
Herbicides are a broad category of pesticides that are used to get rid of undesirable plants like weeds and grasses that hinder the development and productivity of desired agricultural crops. Both 2,4-D and 2,4,5T are also known as 2,4-Dichlorophenoxyacetic acid and
Herbicides like 2,4-D and 2,4,5-T are also referred to as auxin-type herbicides or plant growth regulators. Auxins are hormones that affect cell division and elongation in order to control cell growth.Auxins are required by plant cells in the proper concentration for growth and development. If auxin levels are too low, plant growth is not promoted at all, and if levels are too high, plant growth is excessively stimulated. Most grasses are not killed by 2,4-D and 2,4,5 T, but broadleaf weeds are. It moves to the plant's meristems after being absorbed through the leaves. These herbicides affect the tissues' cells, causing them to continually divide and proliferate. The plant finally dies as a result of this unchecked, unsustainable growth, which also causes stem curling and withering of the leaves.Thus, by promoting cell division, these compounds act as herbicides.
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Which is an advantage of electricity generated from solar panels compared to coal?
Answers
Answer:
it causes no pollution to the environment
For what reasons did many researchers assume that protein was the genetic material?
Answers
Many researchers assumed that protein was the genetic material because at the time, proteins were known to have greater structural complexity and variability than nucleic acids.
Proteins were thought to have more functional diversity and were thought to be better suited for carrying and transmitting genetic information. However, further research revealed that nucleic acids, specifically DNA, were the true carriers of genetic information. This was demonstrated through experiments such as the Hershey-Chase experiment, which showed that DNA, not protein, was responsible for transmitting genetic information in viruses.
Many researchers assumed that protein was the genetic material for several reasons:
1. Complexity: Proteins are composed of 20 different amino acids, while DNA is composed of only 4 nucleotide bases. Due to this higher complexity, researchers believed proteins could store more genetic information than DNA.
2. Structural variety: Proteins have diverse structures and functions, making them appear as suitable candidates for carrying genetic information. DNA, on the other hand, has a more uniform structure.
3. Early discoveries: Initial research on cellular components focused on proteins and their importance in cell function, leading scientists to believe that proteins were the genetic material.
In summary, researchers assumed that proteins were the genetic material due to their complexity, structural variety, and prominence in early scientific discoveries. However, further research, including experiments by Avery, MacLeod, and McCarty, as well as the Hershey-Chase experiment, eventually proved that DNA is the genetic material responsible for inheritance and the transmission of genetic information.
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when every enzymme molecule in the reaction mixture has its substrate binding site occupied by substrate, the kinetics become
Answers
When every enzyme molecule in the reaction mixture has its substrate-binding site occupied by substrate, the kinetics become saturated, and this is known as saturation kinetics.
In saturation kinetics, all of the active sites on the enzyme molecule are occupied by the substrate. In such cases, the reaction rate becomes constant, and further increases in substrate concentration do not increase the rate. Saturation kinetics is achieved when the concentration of substrate is higher than the concentration of enzyme. Once the saturation point is reached, the reaction rate will no longer increase, regardless of how much substrate is added. For example, when a person drinks alcohol, enzymes in the liver break down alcohol into acetaldehyde and then into acetate. If a person drinks more alcohol than the liver enzymes can handle, the enzymes become saturated. The excess alcohol remains in the bloodstream, which can lead to alcohol poisoning. Enzyme saturation can have important clinical implications. Certain drugs can cause enzyme saturation, which means that even if a patient takes more of the drug, it will not have any additional therapeutic benefit. In addition, enzyme saturation can affect how drugs are metabolized in the body, which can have implications for drug toxicity.
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human white blood cells are often multinucleated. how many chromosomes would be present in a white blood cell with two nuclei?
Answers
White blood cells with two nuclei have 46 chromosomes since most of our cells have two sets of chromosomes, making a total of 46 (or 23 pairs) in most cells.
Do human white blood cells frequently have several nuclei?Human white blood cells frequently have several nuclei (in other words, have more than one nucleus). What would the number of chromosomes be in a white blood cell with two nuclei. Depending on the gender, it differs.
Are there two chromosomes in humans?One of the twenty-three pairs of human chromosomes is known as chromosome 2. This chromosome is often found in two copies in humans. The second-largest human chromosome, chromosome 2, accounts for over 8% of the DNA in human cells and spans more than 242 million base pairs.
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An organism has many cells, but cannot move. It does not eat food, but cannot perform photosynthesis cither. What kingdom does it belong to?
Answers
Answer:
Explanation:
Kingdom fungi
The organism which has many cells, cannot move and cannot photosynthesize belongs to kingdom fungi
Organisms in kingdom fungi are:
Multicellular organismsHeterotrophsExhibit passive movementEukaryotesWhat are multicellular organisms?Multicellular organisms are organisms which possesses two or more cells. They are described as many celled organisms.
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Please help!! Null and alternative hypotheses and chi square. Please DO NOT give a fake garbage answer so you can get the points. I have posted this question like 4 times and only gotten those fake answers. If you do that, I will completely lose it and, so help, me, I will rip you to pieces. If you give me a legit answer- thank you so much, I am so grateful, you are being a nice person and have a great day.
Answers
I hope that helped. :)
What are the two main functions of carbohydrates?
Answers
Answer:
They provide energy and store energy
Explanation:
Those should be the two main functions of carbohydrates. I hope this helps! Sry if I get it wrong! :)
Answer:
The four primary functions of carbohydrates in the body are to provide energy, store energy, build macromolecules, and spare protein and fat for other uses.
Explanation: hope this will help you
1 7.1.2 Exam: Semester Exam Question 36 of 42 What tends to happen to a sound wave as air temperature increases? O A. The wave's speed decreases. B. The wave stands still. . O C. The wave vibrates more slowly . D. The wave's speed increases
Answers
Answer:
D
Explanation:
The wave's speed increases when air temperature increases. Therefore, option (D) is correct.
What are sound waves?As air temperature increases, the speed of sound waves in air also increases. This is because air molecules move more quickly at higher temperatures, and the faster-moving molecules can transmit the sound energy more quickly. As a result, sound waves will travel faster through hot air than through cold air.
Conversely, as air temperature decreases, the speed of sound waves in air will decrease as well. This property of sound waves can have practical implications, such as in designing concert halls or sound systems where the temperature of the air needs to be taken into account in order to achieve optimal sound quality.
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Which accurately describes reproduction in gymnosperms? Select four options. Some require heat for seed dispersal. Female cones produce pollen. Most gymnosperms produce male and female cones. Fertilized ovules grow into seeds. Male and female cones may grow on the same plant.
Answers
Answer:
A, C, D, and E are corecct
Explanation:
Some require heat for seed dispersal.Most gymnosperms produce male and female cones. Fertilized ovules grow into seeds. Male and female cones may grow on the same plant.Answer:
A C D E
Explanation:
I just took the quiz and got the question right
Environmental science students are discussing a weed that has invaded a nearby lake due to an increase in the amount of nutrients in the lake’s ecosystem. Which of the following terms decribes this increase?
A)
dessication
B)
intoxication
C)
eutrophication
D)
dumping
E)
pollution
Please select the best answer from the choices provided
A
B
C
D
E
Answers
The increase in nutrients in the lake’s ecosystem is called eutrophication.
Eutrophication is the process by which a body of water becomes enriched with nutrients, typically as a result of human activities such as fertilization and sewage disposal. This can lead to an overgrowth of aquatic plants and algae, which can cause a variety of ecological problems including the invasion of non-native species, changes in the ecosystem’s food chain, and the reduction of oxygen levels in the water. In the given scenario, the presence of the weed in the lake is likely a result of eutrophication, as the increased nutrients in the lake have allowed the weed to thrive and spread.
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What biological process is exemplified by a dog panting to release body heat?
A.homeostasis
B.osmosis
C.translation
D.diffusion
Answers
Answer:
homeostasis i believe, i dont know
Evaporation happens when a liquid turns into a gas. When you sweat, the liquid on your skin evaporates into the atmosphere to cool you off. When you see a dog panting on a hot day, they are actually increasing evaporation from their tongue and mouth to cool off. Conduction transfers heat through direct contact.
During photosynthesis, carbon dioxide and water, in the presence of light,
are used to form sugar (glucose) and oxygen gas
true or false
Answers
PLEASE HELP THE ASSIGNMENTS DUE TODAY
Which of the following statements about human population growth is TRUE?
(2 Points)
a. The population size is growing, and growth rate is increasing.
b. The population size is growing, and growth rate is decreasing.
c. The population size is decreasing, and growth rate is increasing.
d. None of these is true.
Answers
Answer:
The population size is growing, and growth rate is increasing
Answer: a
Explanation:
what is most likely the cause of this difference from the rest of the population
Answers
Answer:
Gene mutation is most likely the cause of this difference from the rest of the population. Log in for more information.
Explanation:
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which of the following modifications increases surface area in the small intestine with fingerlike extensions of the mucosa: group of answer choices haustra rugae villi sphincters circular folds
Answers
Answer:
Villi
Explanation:
The modification that increases surface area in the small intestine with fingerlike extensions of the mucosa is called "villi". Villi are small, finger-like projections that extend from the mucosa (inner lining) of the small intestine. They increase the surface area available for absorption by several hundred times.
what is it light and how does it travel?
Answers
Answer:
Light is both waves and particles, which are described as packets of energy called photons. These waves, or photons, travel in narrow beams called rays. Only when light rays move from one medium to another, such as from air to water, their linear paths altered.
Explanation:
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Answer:
is a transactional reflection from a shiny object that travels through carbon monoxide
Which of the indicated structures contains glands which secrete an alkaline mucus that helps neutralize the acidic chyme?
Answers
Duodenum is indicated structures contains the glands which secrete an alkaline mucus that helps to neutralize the acidic chyme
The duodenum is first part of the small intestine. The main role of the duodenum is to complete the first phase of the digestion. In this section of the intestine, the food from the stomach is mixed with enzymes from the pancreas and bile from gallbladder.
It may be subdivided into four sections: the superior part, is descending part, is horizontal part and is ascending part. The superior part (first part, D1) lies in intraperitoneally and is also enlarged proximally (duodenal bulb
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Solid tumors are clusters of cancer cells and often contain blood vessels. When molecule B binds to the wild-type Brec protein in the plasma membrane of certain solid tumor cancer cells (Figure 1), the cancer cells express the membrane protein A and sometimes stimulate increased growth of blood vessels into the tumors.
Cells with a particular mutation in the Brec gene (Brec-MUT cells) have much increased expression levels of A and stimulate greater growth of blood vessels than do cancer cells with the wild-type Brec (Brec-WT cells); the cells with the mutant Brec can trigger intracellular signaling in the absence of B.
Researchers proposed that the signaling pathway modeled in Figure 1 is triggered by activation of the wild-type Brec and is associated with phosphorylation and activation of kinase D, expression of A, and the ability of the cancer cells to stimulate blood vessel growth.
Part A: Based on the signaling model shown in Figure 1, describe the role of molecule C-P in the activation of D.
Part B: Explain how a molecule such as kinase D can amplify an extracellular signal. Explain how the mutant Brec protein is able to activate kinase D even in the absence of its ligand.
Part C: Based on the proposed signaling pathway, predict the relative activity of kinase D in the Brec-WT cells compared with kinase D in the Brec-MUT cells when both cell types are grown in nutrient broth lacking B. Justify your prediction.
Part D: The researchers claim that treatment with a compound that inhibits dephosphorylation of the intracellular domain of the Brec protein will inhibit expression of A in Brec-WT cells but not in Brec-MUT cells. Based on the information provided, provide reasoning to refute their claim.
Answers
The molecule C-P phosphorylates and thus activates D, whereas Kinase D amplifies cellular signaling by phosphorylating many substrates. In this case, it is expected to observe kinase D overexpression in Brec-MUT cells.
Cancer, phosphorylation and signaling pathwaysCancer can be defined as a multifactorial disease, which is often associated with uncontrolled cell growth.
Cancer signaling may be associated with defective pathways such as, for example, a mutated kinase protein that affects normal downstream molecular cascades.
A kinase is a specific protein that acts to phosphorylate specific cellular substrates, thereby activating/deactivating a particular signaling pathway.
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What does a seismograph measure?
a)the vibrations produced by an earthquake
b)the total amount of energy released by an earthquake
c)the amount of damage that results from an earthquake
d)the distance from the epicenter of an earthquake
Answers
Answer:
b)the total amount of energy released by an earthquake