Which statement is not accurate about the absolute refractory period?
A) Another stimulus, regardless of its strength, cannot initiate another action potential during this period.
B) During this period, voltage-gated Na+ channels open, then close but are inactivated.
C) Immediately following this period, the membrane can experience another action potential if the stimulus is strong enough.
D) This period occurs during the after hyperpolarization phase of the action potential.
E) This period ensures a unidirectional spread of the action potential down a nerve fiber.
Correct Answer:
Verified
Q1: Myelinated axons conduct impulses much faster because
A)
Q3: Graded potentials
A) are local changes in membrane
Q4: When chemically-gated Na+ channels open, the membrane
A)
Q5: When an excitatory neurotransmitter binds to a
Q7: During the rising phase of the action
Q8: A change in a membrane potential from
Q8: Which of the following is responsible for
Q9: A threshold potential is
A) the potential achieved
Q10: The falling phase of the action potential
Q11: When a membrane is stimulated due to
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