Parathyroid hormone (PTH)
A. stimulates kidneys to excrete Ca2+.
B. decreases blood Ca2+ levels.
C. allows the kidneys to retain Ca2+.
D. tends to inhibit osteoclasts.
E. increases Ca2+ excretion by the intestine.
Answer: C
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Which activated clotting factors produce prothrombinase?
A. Factor II and Prothrombin B. Factor V and Factor X C. Thrombin and Factor XIII D. Factor VII and Factor XII
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A) only in the brain. B) throughout the nervous system. C) only in the spinal cord. D) only in spinal nerves. E) only in the CNS.
The binding of antibodies in the blood plasma to their corresponding surface antigens on the erythrocyte plasma membrane is called ________.
Fill in the blank(s) with the appropriate word(s).