Sildenafil (Viagra) prolongs erection by ________.
A. stimulating production of cGMP
B. inactivating guanylate cyclase
C. activating nitric oxide (NO) production
D. inhibiting degradation of cGMP
E. inhibiting nitric oxide (NO) production
Answer: D
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_____ occurs when the inside of the plasma membrane becomes more negative, and ______ occurs when the inside of the plasma membrane becomes less negative.
a. Depolarization, repolarization b. Depolarization, hyperpolarization c. Hyperpolarization, depolarization
Which of the following lipids is formed of four interlocking carbon rings?
A) phospholipid B) cholesterol C) triglyceride D) trans fat E) unsaturated fat
Which of the following structures is labeled C in the diagram?
a) axon terminal b) trigger zone c) cell body d) peripheral process e) dendrites
The greatest loss of fluid electrolytes normally occurs as a result of __________ function.
Fill in the blank(s) with the appropriate word(s).