Which of the following structures does not pass through the hilum of the lungs?
A. Main (primary) bronchi
B. Superior (lobar) bronchi
C. Pulmonary trunk
D. Pulmonary arteries
E. Pulmonary veins
C. Pulmonary trunk
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Which of the following best explains how the phenomenon of "tolerance" develops with use of psychoactive drugs over time?
A. Psychoactive drugs can up-regulate receptors for endogenous neurotransmitters. B. Psychoactive drugs can inhibit production of endogenous neurotransmitters. C. Psychoactive drugs often produce euphoria. D. Psychoactive drugs can alter blood flow to the brain. E. Psychoactive drugs can cross the blood-brain barrier.
The foramen ovale causes the fetal circulatory system to bypass the ________:
a. liver b. lungs c. kidneys d. gonads
If a physiologic condition resulted in blood pH reaching 7.2, but then physiological buffering systems brought the pH to 7.4, that increase in pH would be called
A. alkalosis. B. compensation. C. partial noncompensation. D. imbalance. E. acidosis.
Which statement is true about pulse pressure?
A. As stroke volume decreases, pulse pressure increases. B. As stroke volume decreases, pulse pressure also decreases. C. As stroke volume increases, pulse pressure also increases. D. As stroke volume increases, pulse pressure decreases.