Which structure is located deep within the midbrain?
a. olive
b. red nucleus
c. caudate nucleus
d. thalamus
Answer: b. red nucleus
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Which is not correct regarding lymph nodes?
A. They filter lymph. B. They contain strands of lymphatic cells supported by medullary cords. C. They are drained by afferent lymphatic vessels. D. They contain phagocytic cells. E. None of the choices is correct.
A man is exposed to a virus which specifically targets and kills sustentacular cells (Sertoli cells). What effect will this have on spermatogenesis?
A. Spermatogenic cells will starve and cease development because they won't receive the nutrients or support they need. B. Spermatogonia will not be stimulated to divide because of lack of testosterone secretion. C. Mature sperm won't be loaded with enough ATP to fuel flagellar movement. D. Sperm cells will not mature because spermiogenesis will not occur after meiosis.
Which of the following is/are most important factor(s) affecting the magnitude of centripetal force?
A. tangential linear velocity B. radius of rotation C. mass D. all of the above are equally important
In the skeletal system, compact bone is usually located
A) where stresses come from a limited range of directions. B) where stresses arrive from many directions. C) only in a narrow ring around the diaphysis of long bones. D) in direct contact with articular cartilages. E) where bones are not heavily stressed.