If the myelin sheathing on neurons is absent or removed in a given individual, he or she will exhibit difficulties in speaking, vision, and balance because without myelin, the ____.
a. quantity of neurotransmitters released into synapses will be reduced
b. quantity of neurotransmitters released into synapses will be increased
c. speed of neural conduction along critical paths will be too fast
d. speed of neural conduction along critical paths will be too slow
Question 2
Kawanna notices that her reaction time is much slower than many of her friends' time on various tasks, and she believes this is because the action potentials fired by the cells in her nervous system slow down as they reach the end of the axons. This statement is incorrect because action potentials ____.
a. are fired by cells outside of the nervous system
b. speed up as they reach the end of the axon
c. neither speed up nor slow down as they travel down the axon
d. shoot down the dendrite, not the axon
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