The secretion of ADH is directly stimulated by _______
A) a change in body fluid osmolarity
B) angiotensin II
C) angiotensin I
D) renin
Answer: A) a change in body fluid osmolarity
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Which of the following might serve as a secondary pacemaker for the heart?
A. Purkinje fibers B. AV node C. Neither AV node nor Purkinje fibers D. Both AV node and Purkinje fibers
The gland(s) located near the thyroid is/are the:
A) parathyroid B) thyroid C) adrenal D) androgen
What statement does NOT describe the methods by which chemical buffer systems operate to maintain pH?
A) Buffer systems consist of a weak acid and its conjugate weak base which function to resist large swings in pH. B) When a strong acid is added to a solution, the weak base of the buffer system binds the released hydrogen ions and removes them from solution. C) When a strong base is added to a solution, the buffer system's weak acid releases its hydrogen ions to bind the base ions. D) All excess hydrogen ions are removed from the body in the urine.
A skull with five gracile features and one robust feature is most likely a _______
A. male B. female