How does depolarization of membrane influence sodium- hydrogen exchange？
Homework Answers
Na- H+ membrane protein is an antiporter protein. It transports Na in to the cell and transports H+ ions out. They are present in many cells, especially in kidney tubules.It is responsible primarily in maintaining pH and Na in the cells.
Research indicates that the depolarization of the membrane has no effect on the Na- H+ exchange across the membrane. The pump, electroneutrally exchanges H+ and Na across the membrane. That is why the effect of depolarization on the exchanger is not observed.
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does depolarization of membrane influence sodium- hydrogen
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In some cases, the excited membrane does not immediately repolarize after depolarization. Instead, the potential remains...
In some cases, the excited membrane does not immediately repolarize after depolarization. Instead, the potential remains on a plateau near the peak of the spike potential for some milliseconds, then depolarization begins. This happens in the cardiac muscle fibers (0.2 to 0.3 second delay) due to what type of channels? Explain using the principle of all-or-nothing, absolute refractory period and the directionality of propagation of an action potential.
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What type of current flows through the axon plasma membrane during the steep phase of Depolarization? a) chiefly a sodium current b) chiefly a potassium current c) chiefly a calcium current d) equal currents of sodium and potassium e) equal currents of calcium and potassium
Na^+/K^+ ATPase (sodium potassum adenosine triphosphatase) is found in the plasma membrane and catalyzes the exchange...
Na^+/K^+ ATPase (sodium potassum adenosine triphosphatase) is found in the plasma membrane and catalyzes the exchange of sodium and potassium ions across the membrane. Sort the following statements about the transport system as either true or false.
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Identify the phases of an action potential. +30 Answer Bank undershoot repolarization phase depolarization phase Membrane potential (mV) Resting potential Threshold potential - - - - - - - - - - Time (ms)
Which statements describe the action potential in cardiomyocytes (heart muscle cells)? Depolarization stimulates voltage-gated, slow calcium...
Which statements describe the action potential in cardiomyocytes (heart muscle cells)? Depolarization stimulates voltage-gated, slow calcium channels to open. The absolute refractory period can last for about 200 ms. Rapid sodium influx causes the membrane to rapidly depolarize. Repolarization occurs immediately after the initial depolarization.
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If the membrane of the mitochondria became permeable to hydrogen ions, how would this affect cellular...
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1) Predict how different molecules and modifications to the plasma membrane influence permeability. 2) Provide examples...
1) Predict how different molecules and modifications to the plasma membrane influence permeability. 2) Provide examples illustrating the various ways substances move across the plasma membranes.
Na^+/K^+ ATPase (sodium potassum adenosine triphosphatase) is found in the plasma membrane and catalyzes the exchange of sodium and potassium ions across the membrane. Sort the following statements about the transport system as either true or false.
Identify the phases of an action potential. +30 Answer Bank undershoot repolarization phase depolarization phase Membrane potential (mV) Resting potential Threshold potential - - - - - - - - - - Time (ms)
Which statements describe the action potential in cardiomyocytes (heart muscle cells)? Depolarization stimulates voltage-gated, slow calcium channels to open. The absolute refractory period can last for about 200 ms. Rapid sodium influx causes the membrane to rapidly depolarize. Repolarization occurs immediately after the initial depolarization.
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