The plateau portion of the O2-Hb curve
a. is in the blood-PO2 range that exists at the pulmonary capillaries.
b. means that hemoglobin becomes almost nearly saturated in the lungs unless the pulmonary capillary PO2 falls below 60 mm Hg.
c. is in the blood-PO2 range that exists at the systemic capillaries.
d. both (a) and (b) above.
e. both (b) and (c) above.
D
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Synthesis reactions are particularly important in the body for
A. neutralization of acids by buffers. B. release of energy. C. growth of body parts. D. digestion of food products.
When comparing veins and arteries of the same diameter, which of the following statements is not true?
A. Veins have fewer smooth muscle fibers. B. Veins have thinner walls. C. Veins have valves. D. Veins have a larger lumen. E. Veins have more elastic tissue.
In which of the following situations is compliance greatest?
A. Collapse of the alveoli B. Pulmonary fibrosis C. Pulmonary edema D. Airway obstruction E. Emphysema
A pyrogen is a substance that causes ________
A) cytolysis B) complement fixation C) opsonization D) fever E) inflammation