A hockey player gets hit on the side of his knee with a puck and feels a pop. After rest and icing, he finds that his lower leg feels "loose" and has a tendency to hyperextend. What injury has he likely suffered?
A. A torn anterior cruciate ligament
B. A torn calcaneal (Achilles) tendon
C. A torn posterior tibiofibular ligament
D. A torn transverse ligament
A. A torn anterior cruciate ligament
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Through which mechanism does perspiration function in cooling the body?
A) conduction B) evaporation C) convection D) radiation E) diffusion
If gametes were diploid like somatic cells, how many chromosomes would the zygote contain?
A) twice the diploid number, and with every succeeding generation, the chromosome number would continue to double and normal development could not occur B) triple the diploid number, and with every succeeding generation, the chromosome number would continue to triple and normal development would not occur C) half the diploid number with no change in development D) There is no relationship between gametes and somatic cells.
Which type of bone cell has a ruffled border and secretes acids?
A. Osteoblast B. Osteocyte C. Osteoclast D. Osteochondral progenitor cell
Endocrine glands
A. lack ducts and secrete their products onto the skin surface. B. secrete mucus directly into a body cavity. C. possess ducts to secrete their products into the bloodstream or into interstitial fluid. D. lack ducts and secrete their products into the bloodstream or into interstitial fluid. E. possess short ducts and secrete their products directly onto the skin surface.