Place these steps of the action potential in the correct order. 1. Sodium ions channels return to the resting state and repolarization continues.
2) Voltage -gated sodium ion channels activate, sodium ions enter, and the axon section depolarizes.
3) As potassium ion channels return to resting state, the axolemma may hyperpolarize before returning to the resting membrane potential.
4) A local potential depolarizes the axolemma of the trigger zone to threshold.
5) Sodium ion channels inactivate, and voltage -gated potassium ion channels activate, so sodium ions stop entering and potassium ions leave, beginning repolarization.
A) 2, 4, 5, 1, 3
B) 4, 2, 5, 1, 3
C) 4, 2, 3, 5, 1
D) 4, 2, 1, 3, 5
Correct Answer:
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Q23: During repolarization of a neuron:
A) potassium ions
Q24: Voltage -gated sodium channels have both an
Q25: Which of the following is the primary
Q26: Graded potentials:
A) cause repolarization.
B) produce an effect
Q27: The influx of positive charges makes the
Q29: What channels open or close in response
Q30: If a resting axon increases its permeability
Q31: Resting membrane potential is maintained by the
Q32: What is more likely to promote an
Q33: Using the information provided in this graph,
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