Multiple Choice
Depolarization occurs when:
A) the difference in potential across the cell membrane is −70 mV
B) the difference in potential across the cell membrane is −55 mV
C) the neuron has reached its resting potential
D) there is a discharge of sodium ions into the extracellular space
Correct Answer:
Verified
Correct Answer:
Verified
Q20: _ results from an inability to transmit
Q21: An electrical synapse:<br>A)occurs at the synaptic cleft<br>B)occurs
Q22: The direction of a neural impulse travels
Q23: How does degeneration of the CNS differ
Q24: Channels in the cell membrane:<br>A)are always gated<br>B)help
Q26: Primary neuronal loss:<br>A)is variable in degree of
Q27: The major inhibitory neurotransmitter is:<br>A)dopamine<br>B)epinephrine<br>C)GABA<br>D)glutamate<br>E)the neuropeptides
Q28: During resting potential:<br>A)the extracellular fluid is 70
Q29: A neuron with an axon of small
Q30: Axons of neurons:<br>A)vary greatly in number<br>B)are relatively