During the inflammation process the mast cells release _________, which causes vasodilation.
A. interferon
B. histamine
C. defensin
D. heparin
Ans: B. histamine
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Which is not correct regarding the posterior pituitary?
A. It is derived from nervous tissue B. It releases its hormones in response to nervous stimulation C. It is connected to the hypothalamus by the hypothalamo-hypophyseal tract D. It stores oxytocin and antidiuretic hormone E. It is composed of the pars intermedia and the infundibular stalk
Activation of the extrinsic pathway of coagulation requires exposure of the blood to _________.
A. collagen B. tissue factor III C. prothrombin activator D. serotonin
Hyponatremia can sometimes be seen in individuals whose ECF volume is decreased by more than 10%. Which of the following factors contributes to the development of hyponatremia in this situation?
A. decreased levels of ADH B. elevated levels of natriuretic peptides C. increased excretion of Na+ by the kidneys D. reduced excretion of solute-free water by the kidneys E. development of positive Na+ balance
Molecules that have properties of both polar and nonpolar molecules are called
A. hydrophobic. B. hydrophilic. C. amphipathic. D. unipolar. E. bipolar.