When flexing the elbow, the biceps brachii, brachioradialis, and brachialis are the three major agonists recruited to perform this movement because all cause flexion at the elbow. However, the biceps also cause supination, an undesired movement. Therefore another muscle acting as a ________, causing ________ must be recruited to prevent the undesired motion.
A. stabilizer, extension
B. neutralizer, extension
C. stabilizer, pronation
D. neutralizer, pronation
D. neutralizer, pronation
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Both the knee and temporomandibular joints contain cartilaginous structures that absorb and cushion shock called ________.
Fill in the blank(s) with the appropriate word(s).
The ________ system exchanges oxygen and carbon dioxide with the air, whereas the ________ system transports oxygen and carbon dioxide throughout the body.
A. respiratory; urinary B. circulatory; digestive C. respiratory; circulatory D. circulatory; urinary E. respiratory; digestive
Which of the following muscles is named for its action?
A) deltoid B) adductor magnus C) biceps brachii D) gluteus maximus
During the contractions of gastric emptying
A. the strongest contractions are in the antrum of the stomach because the intrinsic pacemaker frequency is fastest there. B. the pyloric sphincter opens to allow stomach contents to pass quickly and completely into the duodenum. C. the strength of stomach wall contractions is increased when the duodenum secretes cholecystokinin. D. the pyloric sphincter closes to allow only a small amount of liquefied chyme to pass into the duodenum with each contraction of the stomach. E. the stomach is induced to contract by increased sympathetic activity.