Which of the following is not associated with the large absorptive surface of the small intestine?0-2013
A. Villi
B. Rugae
C. Circular folds (plicae circulares)
D. Microvilli
E. Intestinal length
Answer: B
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Sympathetic nerve fibers that innervate blood vessel walls are found primarily in the
A. tunica intima. B. tunica media. C. tunica adventitia. D. tunica externa. E. tunica interna.
When plasma O2 concentrations are falling, the rising plasma CO2 binds to the __________ of the hemoglobin molecule.
a. heme b. porphyrin c. alpha and beta chains d. none of the listed responses is correct
The synapse more common in embryonic nervous tissue than in adults is the ________.
Fill in the blank(s) with the appropriate word(s).
What is the normal range of white blood cells per milliliter of blood?
a. 40 to 50 million b. 32 to 35 million c. 20 to 25 million d. 12 to 18 million e. 5 to 10 million