Multiple Choice
The sodium-potassium pump __________.
45. Nervous System
Neurons and Action Potentials
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What is an increase in the magnitude of the membrane potential called?
A
Hypopolarization
B
Depolarization
C
A refractory period
D
None of the listed responses is correct.
E
Hyperpolarization
Verified step by step guidance1
Understand the concept of membrane potential: Membrane potential refers to the difference in electric potential between the interior and the exterior of a biological cell. It is crucial for the function of nerve and muscle cells.
Identify what an increase in the magnitude of the membrane potential means: An increase in magnitude implies that the difference between the inside and outside of the cell becomes greater, making the inside more negative compared to the outside.
Define hyperpolarization: Hyperpolarization is the term used to describe an increase in the membrane potential's magnitude, where the inside of the cell becomes more negative than the resting potential.
Differentiate between hyperpolarization and depolarization: Depolarization is the opposite process, where the membrane potential becomes less negative (more positive), reducing the difference between the inside and outside of the cell.
Conclude that the correct term for an increase in the magnitude of the membrane potential is hyperpolarization, as it involves the cell interior becoming more negative.
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