Suppose that after an action potential we clam p the membrane potential at -50 mV and don’t let it completely repolarize. We find that we cannot elicit an action potential. This is called a depolarization block. What causes it?
A) Persistently elevated gK
B) The inactivation gates do not re-open
C) The activation gates of the Na channel are closed
D) Persistently elevated gNa
E) The inactivation gates are stuck open
Correct Answer:
Verified
Q8: The Em for a cell is -70
Q9: At rest, the Na channel
A) Activation gates
Q10: In the Hodgkin-Huxley explanation of the action
Q11: Depolarization refers to
A) Making the membrane potential
Q12: “Latency” refers to the
A) Delay between increase
Q13: The first step in the nerve action
Q14: The time after an excitation during which
Q15: The inability of neurons to generate only
Q16: In most cells, Increasing gNa would cause
A)
Q18: The time after an excitation during which
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