Which of the following describes a body process that is controlled using a positive feedback loop?
a) increasing body temperature in response to a drop in body temperature
b) decreasing body temperature in response to elevated body temperature
c) decreasing blood [glucose] in response to elevated blood [glucose]
d) increasing strength of uterine contractions in response to cervical stretch
e) decreasing heart rate in response to elevated blood pressure
Answer: d
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The function of the choroid plexus is to manufacture ____________________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about the Na+-K+ ATPase pump is false?
A. It binds to, and hydrolyzes, ATP. B. It transports Na+ and K+ in a 1:1 ratio. C. It is constantly active in all cells. D. Its activity requires the expenditure of metabolic energy. E. It transports Na+ out of cells and K+ into cells.
Which of the following exemplifies the antagonistic effects of the two divisions of the ANS?
A. Intestinal motility B. Erection of the hair C. Blood flow to skeletal muscles D. Blood clotting E. Sweating
Which of the following vessels gives rise to the common hepatic artery, left gastric artery, and splenic artery?
A) celiac trunk B) superior mesenteric artery C) superior epigastric artery D) intestinal arteries