External respiration involves the

A) movement of air into and out of the lungs.
B) diffusion of gases between the interstitial fluid and the external environment.
C) exchange of dissolved gases between the cells and interstitial fluids.
D) binding of oxygen by hemoglobin.
E) utilization of oxygen by tissues to support metabolism.


B

Anatomy & Physiology

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There are three different types of cones, each one sensitive to different light energies. These cones are designated

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The ribosomes of the rough ER synthesize ____________________, whereas its membranous walls contain enzymes essential for the synthesis of ____________________

Fill in the blank(s) with correct word

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The analysis of the smallest units of life is called ________.

A) embryology B) cytology C) physiology D) histology E) morphology

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The zona glomerulosa of the adrenal cortex produces

A) androgens. B) glucocorticoids. C) mineralocorticoids. D) epinephrine. E) norepinephrine.

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