After blood diffuses across the capillary membrane and perfuses the cells, it:
A. drops off carbon dioxide and returns oxygenated blood to the heart.
B. returns carbon dioxide to the left side of the heart, starting with the veins.
C. forms lactic and pyruvic acids, which are used by the cells to form energy.
D. returns waste products to the right side of the heart, starting with the venules.
Answer: D. returns waste products to the right side of the heart, starting with the venules.
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Large nitrogen bubbles can act as a(n):
a. carrier for glucose. b. embolus that blocks blood flow. c. oxygen inhibitor. d. carbon dioxide carrier.
Ultimately, why does a patient who is hyperventilating have difficulty breathing?
a. Because of a lack of carbon dioxide, the patient loses blood flow to the brain. b. Because of a lack of oxygen, the patient loses blood flow to the brain. c. Because of a lack of carbon dioxide, the patient must consciously work to inhale and exhale. d. Because of a lack of oxygen, the patient must consciously work to inhale and exhale.