Isaac observed a sample of motor units in which single neurons innervated fibers of the same type. This led Isaac to conclude that

a. neural input probably determines the identity of muscle fibers as slow or fast-twitch

b. the organism that supplied the samples had probably suffered a spinal cord injury.
c. the organism that supplied the samples was very old.
d. his sample was not representative, and he needed to obtain more samples before reaching a conclusion.


a

Psychology

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Insomnia is a sleep disorder in which a person:

a. is excessively sleepy and often catnaps during the day b. has difficulty initiating or maintaining sleep c. repeatedly stops breathing during sleep d. wanders about while still sleeping

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What will be an ideal response?

Psychology

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What will be an ideal response?

Psychology