A young girl falls while riding her bicycle. Initially she seems fine, but later she complains of severe femoral pain. Where is her pain?
A. Her foot
B. Her lower leg
C. Her knee
D. Her thigh
Answer: D
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Thin filaments in skeletal muscle are composed of
a. actin. b. troponin and tropomysosin. c. myosin. d. actin, troponin, and tropomyosin. e. all of these answers.
Luteinizing hormone (LH) binds to interstitial (Leydig) cells and
A. increases testosterone production by the interstitial cells. B. inhibits sustentacular cells. C. promotes sperm cell production by the interstitial cells. D. decreases testosterone production by the interstitial cells. E. stimulates GnRH levels to increase in the testes.
The surgical neck of the humerus is the constricted region immediately adjacent to the head.
Answer the following statement true (T) or false (F)
The ability of the blood to supply oxygen and remove carbon dioxide from the tissues depends upon
A) the ability of the blood to remain in constant motion. B) the osmotic balance, as controlled by the kidneys. C) the rate at which platelets are manufactured. D) the diameter of the capillaries. E) the number of white blood cells in the circulation.