Aspirin helps prevent blood clots by ____
a. blocking the activation of thrombin
b. reducing platelet aggregation
c. reducing vessel spasm
d. stimulating the conversion of fibrinogen to fibrin
e. stimulating the activation of factor X
ANSWER: b
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Which are not correctly paired?
a. Gastropodia - snails b. Cephalapodia - squid c. Bivalvia - mussels d. Gastropoda - clams e. Bivalvia - scallops
Carbonic anhydrase
a. combines with water to form carbonic acid. b. dissociates into bicarbonate and hydrogen ions. c. is normally found in red blood cells. d. is responsible for maintaining the high levels of carbon dioxide in the lungs and the low levels of carbon dioxide in the body tissues. e. dissociates into carbonic acid and hydrogen ions.
Leydig cells within the developing testis secrete _______ .
a. (AMH)- Anti-Mullerian Hormone b. (GnRH)- Gonadotropin-releasing hormone c. testosterone d. progesterone
How many vertebrae are there?
A. 5 B. 24 C. 10 D. 18 E. 33