Why is Sodium-Potassium ATPase the only protein to move both sodium and potassium ions into and out of the cell?
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Q: How do the pumps and channels differentiate between sodium and potassium ions to selectively move…
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A:
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Q: What is the significance of knowing the reason why the same protein system moves both sodium and…
A: Na+ : Sodium ion K+ : Potassium ion Na+ - K+ ATPase pump moves sodium out of the cell and potassium…
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Q: How do proton pumps contribute to membrane potential? Please explain in 3-8 sentences
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Q: What are the enzymatic activities of the sodium-potassium ATPase (pump)?
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Q: How do proton pumps contribute to membrane potential?
A: there are two types of transport - passive transport - ions will move down the hill- ions will…
Q: Why glucose does not cross the cell membrane through open channels?
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Why is Sodium-Potassium ATPase the only protein to move both sodium and potassium ions into and out of the cell?
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- What are the enzymatic activities of the sodium-potassium ATPase (pump)? binds to and hydrolyzes ATP; binds to 3 Na+ in cytoplasm and releases outside cell; binds to 2 K+ outside cell and releases into cytoplasm binds to and hydrolyzes GTP; binds to 3 Na+ in cytoplasm and releases into nucleus; binds to 2 K+ inside cell and releases into lysosome binds to and hydrolyzes 3 ATP; binds to 1 Na+ in cytoplasm and releases outside cell; binds to 1 K+ outside cell and releases into cytoplasm binds to and hydrolyzes ATP; binds to 2 Na+ in cytoplasm and releases outside cell; binds to 3 K+ outside cell and releases into cytoplasmWhich of the following statements about the sodium-potassium pump is correct? A) Both sodium and potassium move down their concentration gradient across the membrane B) 2 sodium ions are pumped out of the cell against their concentration gradient C) The sodium-potassium pump is a type of cotransport. D) ATP is used as an energy sourceThe sodium-potassium pump generates the following concentration gradients across the plasma membrane: high [Na"] and [K*] inside the cell and low [Na*] and [K] outside. high [Na ] and low [K] inside the cell and low [Na] and high [K] outside. low [Na] and [K*] inside the cell and high [Na*] and [K*] outside. low [Na"] and high [K*] inside the cell and high [Na] and low [K] outside.
- The resting membrane potential is established by? The Na+/K+-ATPase pumping Na+ into the cell and K+ out of the cell The Na+/K+-ATPase pumping K+ into the cell and Na+ out of the cell A larger diffusion of K+ out of the cell compared to diffusion of Na+ into the cell A larger diffusion of K+ into the cell compared to diffusion of Na+ out of the cell a) and d) b) and c)Describe the contribution of each of the following to establishing and maintaining membrane potential: (a) the Na+K+ pump, (b) passive movement of K+ across the membrane, (c) passive movement of Na+ across the membrane, and (d) the large intracellular anions.Which of the following is ther eason why the potassium leaves the cell readily at the peak of the action potential?A) The sodium-potassium pumps work hard to return potassium to the extracellular fluid. B) Diffusion will continue to push potassium into the cell, but electrostatic pressure will move potassium out of the cell. C) Diffusion will push potassium out of the cell, but electrostatic pressure continues to attract potassium to the interior of the cell. D) Both diffusion and electrostatic pressure will cause potassium to exit the cell.
- Typically, there is an ion gradient between the cytoplasm and the interior of synaptic vesicles. The ion gradient has a functional role. Which of the following statements best describes the ion gradient across the synaptic vesicle membrane and its role? a.) There is a proton gradient across the synaptic vesicle membrane, and it provides the driving force for the transport of neurotransmitter into the vesicle. b.) There is a sodium gradient across the synaptic vesicle membrane, and it provides the driving force for the transport of neurotransmitter into the vesicle. c.) There is a proton gradient across the synaptic vesicle membrane, and it provides the driving force for the transport of neurotransmitter out of the vesicle. d.) There is a sodium gradient across the synaptic vesicle membrane, and it provides the driving force for the transport of neurotransmitter out of the vesicle.How do the pumps and channels differentiate between sodium and potassium ions to selectively move one out of the cell and the other into the cell?How do proton pumps contribute to membrane potential? Please explain in 3-8 sentences
- For each type of membrane transport, know the following:– Is a transporter protein required? If so, what type?– Is there an energy requirement, and if so, what is the energy source?– What is the relative rate of solute transport based on molecule type? On concentration gradient?– What are examples of the types of solutes transported by carriers and channels?What would happen in each of the following cases where something related to intracellular transport is altered? Assume in each case that the protein involved is a soluble protein, not a membrane protein. State where each protein would be located and explain each of your answers. You add a signal sequence (for the Golgi) to the N-terminal end of a normally cytosolic protein. You change the hydrophobic amino acids in an ER signal sequence into other, hydrophobic, amino acids.What is the source of energy that drives unidirectional transfer across the membrane?