Sensory nerves that detect changes in a variable that is being regulated comprise the ________ of the control mechanism.
Fill in the blank(s) with the appropriate word(s).
receptor
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The most abundant cation within cells is
A. chloride. B. calcium. C. sodium. D. potassium. E. magnesium.
Which of the following are NOT an endogenously produced analgesics?
A. Dynorphins B. Endorphins C. Interleukin-2 D. Enkephalins
A hepatic triad contains branches of all of the following vessels except
A. a bile ductule. B. the hepatic vein. C. the hepatic portal vein. D. the hepatic artery. E. a hepatic triad contains branches of all of these vessels.
Which of the following statements describes the function of basophils in the second line of defense?
A. Attack worm parasites. B. Become macrophages to phagocytize bacteria. C. Fight bacteria. D. Release histamine to promote inflammation.