During hyperventilation, why do some people detect a tingling sensation in their hands and feet?
A) a decrease in carbon dioxide in blood
B) an increase in carbon dioxide in blood
C) widespread release of catecholamines
D) hyperexcitability of afferent neurons
E) a decrease in blood flow to the distal extremities
Answer: D) hyperexcitability of afferent neurons
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Which of the following is not a function of epithelial tissue?
A. It prevents the intrusion of microbes. B. It absorbs substances. C. It produces specialized secretions. D. It stores energy. E. It resists abrasion.
The approximate number of white blood cells in a cubic millimeter of blood is:
a. 7,500 b. 75,000 c. 750,000 d. 7,500,000
Which of the following statements regarding renal handling of Na+ is correct?
A. In the absence of aldosterone, Na+ will be secreted by the cortical collecting ducts. B. In the proximal tubule, Na+ is actively transported across the luminal membrane of the tubular epithelial cells. C. Atrial natriuretic factor increases Na+ reabsorption. D. Na+ is actively reabsorbed in the ascending limb of the loop of Henle. E. Without vasopressin, the collecting duct is impermeable to Na+.
The plural of axilla (armpit) is ________, whereas the plural of appendix is ________.
A. axilli; appendices B. axillides; appendages C. axillies; appendi D. axillae; appendices