Vasopressin has which of the following actions?

A. increases the water permeability of the thick ascending limb of Henle's loop
B. increases the urea permeability of the cortical portion of the collecting duct
C. increases the water permeability of the collecting duct
D. decreases the GFR
E. increases the water permeability of the proximal tubule


ANS: D

Anatomy & Physiology

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Decrease in alveolar oxygen concentration causes

a. vasoconstriction of the pulmonary arteriole. b. relaxation of bronchiolar smooth muscle. c. vasodilation of the pulmonary arteriole. d. vasoconstriction of the pulmonary arteriole and vasodilation of the pulmonary arteriole. e. vasoconstriction of the pulmonary arteriole and relaxation of bronchiolar smooth muscle.

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Indicate whether the statement is true or false

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If a person were to have substantial blood loss you would expect to see all of the following physiological events to except one. Select the least likely response to substantial blood loss

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