Muscles that laterally rotate the thigh include all of the following except the
A) gluteus maximus.
B) obturator internus.
C) obturator externus.
D) piriformis.
E) tensor fasciae latae.
E
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Calcium ions serve as messengers, often in combination with the intracellular protein
A) calcitonin. B) calcitriol. C) calmodulin. D) calcium-binding globulin. E) calcitropin.
A male bodybuilder starts taking injections of testosterone (an anabolic steroid on a daily basis. After three weeks, you expect to observe all of the following, except
A) increased sex drive. B) decreased levels of GnRH. C) decreased levels of LH and FSH. D) increased muscle mass. E) decreased nurse cell stimulation.
According to the sliding-filament mechanism of muscle contraction, the
a. A bands slide in closer between the I bands. b. thin filaments slide inward toward the center of the A band. c. Z lines slide in between the T tubules. d. contractile proteins contract, thus shortening the sarcomere. e. filaments slide into the lateral sacs of the sarcoplasmic reticulum.
Kevin was playing softball with some friends and was hit in the face by a ball fracturing one of the bones. Select the bone matched with its proper description that was most likely fractured?
A. Zygomatic bone - irregular B. Nasal bone - flat C. Occipital bone - flat D. Temporal bone - short