In the experiment on stimulation of the isolated sciatic nerve, the compound action potential increases in amplitude with an increase in stimulation voltage. This is due to ________
A) recruitment of large diameter axons followed by small diameter axons in the nerve
B) increase in the size of action potentials produced be each individual axon in the nerve
C) recruitment of small diameter axons followed by large diameter axons in the nerve
D) simultaneous recruitment of small and large diameter axons in the nerve
Answer: A
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Which of the following sets of cranial nerves all carry preganglionic parasympathetic (general visceral efferent) fibers?
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Increased cytosolic ________ concentrations are necessary for muscular contractions to occur properly.
Fill in the blank(s) with the appropriate word(s).
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1. increased frequency of action potentials in sensory neurons 2. stretch of the muscle spindles 3. increased frequency of action potentials in the alpha motor neurons 4. stretch of the quadriceps femoris 5. contraction of the quadriceps femoris Which of these lists most closely describes the sequence of events as they normally occur? A) 4,1,2,3,5 B) 4,1,3,2,5 C) 1,4,3,2,5 D) 4,2,1,3,5 E) 4,2,3,1,5