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

Anatomy & Physiology

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The plural of axilla (armpit) is ________, whereas the plural of appendix is ________.

A. axilli; appendices B. axillides; appendages C. axillies; appendi D. axillae; appendices

Anatomy & Physiology

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.

Anatomy & Physiology

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

Anatomy & Physiology

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+.

Anatomy & Physiology