Which of the following is NOT a contributing factor to skeletal muscle fatigue?
A. Depletion of intracellular K+
B. Accumulation of cytoplasmic PO43-
C. Increased intracellular K+
D. Accumulation of extracellular K+
Answer: C
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How does the brain distinguish high-pitched from low-pitched sounds?
A. High-pitched sounds cause the cochlear nerve fibers to fire more rapidly. B. High-pitched sounds stimulate hair cells near the tip of the cochlea. C. Low-pitched sounds stimulate hair cells near the tip of the cochlea. D. Low-pitched sounds cause the cochlear nerve fibers to fire more rapidly. E. High-pitched sounds cause the basilar membrane to vibrate more vigorously.
The gradual increase in estrogen secretion during the follicular phase is the result of
A. declining FSH levels. B. luteal development. C. an LH surge. D. positive feedback on the anterior pituitary. E. granulosa cells converting androgens to estrogen.
Three hours after your lunch and you are absorbing nutrients, which digestive phase are you in?
A. Absorptive state B. Vasoactive state C. Postabsorptive state D. Gastric state
Define stretch reflex
A) A stretch reflex is an example of a withdrawal reflex that contracts the flexor muscles of a limb in response to a painful stimulus. B) A stretch reflex is a polysynaptic reflex that activates extensor muscles in the opposite leg or arm when a flexor reflex is activated. C) A stretch reflex is a monosynaptic reflex that activates extensor muscles in the opposite leg or arm when a flexor reflex is activated. D) A stretch reflex is a monosynaptic reflex that provides regulation of skeletal muscle length. E) A stretch reflex is a polysynaptic reflex that provides regulation of skeletal muscle length.