Asked by Harry Zhang on May 04, 2024
Verified
Which of the following events is NOT a characteristic of an action potential?
A) The plasma membrane becomes highly permeable to Na+ and depolarization results.
B) As Na+ enter, the inside of the plasma membrane becomes more negative.
C) At the peak of depolarization, Na+ channels begin to close and K+ channels open.
D) In repolarization, K+ flow out of the cell.
E) Action potentials occur according to the all-or-none principle.
Action Potential
An action potential is a rapid electrical impulse that travels along the membrane of a neuron or muscle cell, facilitating communication and response.
Plasma Membrane
A two-layer lipid membrane that surrounds the cytoplasm within a cell, governing how substances move in and out.
Depolarization
The process during which a cell's membrane potential becomes less negative, making it more likely to fire an action potential.
- Explain the process and characteristics of action potentials, including their phases (depolarization, repolarization, hyperpolarization) and the concept of the all-or-none principle.
- Shed light on how sodium (Na+), potassium (K+), and others ions contribute to the production of action potentials and the maintenance of the resting membrane potential.
Verified Answer
Learning Objectives
- Explain the process and characteristics of action potentials, including their phases (depolarization, repolarization, hyperpolarization) and the concept of the all-or-none principle.
- Shed light on how sodium (Na+), potassium (K+), and others ions contribute to the production of action potentials and the maintenance of the resting membrane potential.
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