Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Question

During a relative refractory period of an action potential

  A.

Another action potential can be fired, it just takes a greater stimulus for the membrane potential to reach threshold
  B.

Na+ channels are either already open or are inactivated therefore the membrane absolutely can not produce another action potential, no matter how intense the stimulus
  C.

Ca++ flows out of the cell, causing hyperpolarization and a need for a greater stimulus to generate the action potential
  D.

The presynaptic neuron "tells" the postsynaptic neuron about the "relative" strength of signal
  E.

None of the above are correct
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