What is the general purpose of positive feedback mechanisms?
A. to maintain a constant internal environment
B. to anticipate changes in the environment
C. to return a variable toward the set point
D. to bring about a rapid change in the body
E. to detect changes in the external environment
D
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Tom has hepatitis, an inflammation of the liver. Which of the following symptoms would you expect to observe in Tom?
A) jaundice B) elevated levels of blood glucose C) impaired digestion of protein D) blood in the feces E) overproduction of blood plasma albumin
Which is not considered part of the hindbrain?
A. Pons B. Quadrigeminal plate C. Cerebellum D. Medulla oblongata E. All of the above
Glucagon is synthesized by the ________ cells of the pancreas.
Fill in the blank(s) with the appropriate word(s).
Which of the following is a paired structure?
a. cerebral (mesencephalic) aqueduct b. median aperture c. central canal of spinal cord d. lateral aperture