Asked by Aaron Trudeau on May 07, 2024
Verified
The opening of more and more Na+ channels during depolarization
A) is the result of the sodium-potassium exchange pump.
B) is an example of a positive feedback cycle.
C) is possible only if K+ channels remain closed.
D) is the cause of the afterpotential.
E) is an example of a negative feedback cycle.
Positive Feedback Cycle
A process where the end products of an action cause more of that action to occur in a feedback loop, amplifying the original action.
Sodium-Potassium Exchange Pump
A membrane-bound enzyme complex that pumps sodium out of cells while pumping potassium into cells, crucial for maintaining cellular concentration and electrical gradients.
Afterpotential
The transient changes in membrane potential that follow an action potential, including hyperpolarization or depolarization phases, affecting neuron's firing rate.
- Outline the progression and hallmarks of action potentials, discussing their phases (depolarization, repolarization, hyperpolarization) and the all-or-none concept.
- Discuss the significance of sodium (Na+), potassium (K+), and other ions in action potential generation and in the conservation of the resting membrane potential.
Verified Answer
Learning Objectives
- Outline the progression and hallmarks of action potentials, discussing their phases (depolarization, repolarization, hyperpolarization) and the all-or-none concept.
- Discuss the significance of sodium (Na+), potassium (K+), and other ions in action potential generation and in the conservation of the resting membrane potential.
Related questions
Depolarization of the Nerve Plasma Membrane Occurs When There Is ...
A Stimulus Either Causes an Action Potential or It Doesn't ...
When Repolarization of a Neuron Is Complete, the ...
Which of the Following Events Is NOT a Characteristic of ...
During the Action Potential, Just After __________ Ions Enter the ...