How many cervical vertebrae do humans have?
A) 5
B) 8
C) 12
D) 7
Answer: D
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In males, the urogenital folds close over the urogenital opening and urethral groove to form the ________.
A. vas deferens B. scrotum C. testes D. penis E. prostate gland
________ established a code of ethics for physicians. He is considered the "father of medicine."
A. Vesalius B. Hippocrates C. Aristotle D. Galen E. Hooke
What does ventilation-perfusion coupling refer to?
A. The air flow to the lung must be greater than the blood flow to the lung. B. The air flow to the lung must be less than the blood flow to the lung. C. The air flow to the lung must match the blood flow to the lung. D. The air flow to the lung must be greater than or less than but not equal to the blood flow to the lung.
The reactions of the Krebs cycle:
A. take place in the cytosol of human cells. B. generate ATP directly by substrate-level phosphorylation. C. are important for the metabolism of carbohydrates but not other molecules. D. take place only when no oxygen is present. E. produce pyruvate and lactate as end products.