The radioulnar joint allows a person to turn their hands so that the palms face anteriorly (as in anatomical position) or to face posteriorly. The radioulnar joint is an example of what type of synovial joint?
A: plane
B: pivot
C: condyloid
D: saddle
E: hinge
B: pivot
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A long-distance runner is about to enter a 5-mile race. Beforehand, he spends several minutes warming up. During the warm-up period, the phenomenon of treppe is occurring in body muscles being used. What is treppe and why does it occur?
What will be an ideal response?
Which tonsils are located on either side of the throat?
a. pharyngeal tonsils b. palatine tonsils c. adenoids d. both A and C above
Defecation following a meal is usually the result of
A. segmentation movements stimulated by the duodenocolic reflexes. B. peristalsis in the small intestine initiated by entry of chyme into the duodenum. C. mass movements stimulated by the gastrocolic and duodenocolic reflexes moving feces towards the rectum.
Capillaries are best described as
A) thin walled vessels that carry blood deficient in oxygen. B) thick walled vessels that carry blood rich in oxygen. C) microscopic vessels in which blood exchanges material with the interstitial fluid. D) thick walled vessels that convey blood away from the heart. E) thin walled vessels that convey blood toward the heart.