Surfactant facilitates alveolar ventilation by
A. decreasing the surface tension between water molecules on the lining of the alveoli.
B. decreasing thoracic compliance.
C. attracting water to the alveolar surface.
D. increasing the surface area for gas exchange.
E. increases the surface tension between fluid and the alveoli.
A
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If a patient is administered a powerful glucocorticoid (such as prednisone) to suppress the immune system, what unintended effects might this have on blood chemistry?
A) increase of insulin B) decrease of insulin C) increase of blood glucose D) decrease of blood glucose E) both an increase of insulin and an increase of blood glucose
The anatomical dead space is greatest in which of the following situations?
A. After waking up from a long nap B. After watching TV for an hour C. After swerving to narrowly avoid an accident while driving D. After eating a large meal
The secretions produced by the prostate gland
A. are acidic. B. contain fructose. C. contain mucous. D. constitute about 30% of the semen. E. constitute about 90% of the semen.
Positive feedback helps to restore normal function when one of the body's physiological variables gets out of balance
Indicate whether the statement is true or false