When the body is too warm, dermal blood vessels will undergo ________ in order to increase heat loss.
Fill in the blank(s) with the appropriate word(s).
vasodilation
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Which of the following are components of the pelvic girdle?
A) sacrum. B) coxal bones. C) all of the above. D) hip bones.
________ have 46 chromosomes, whereas ________ have 23.
A. Type A spermatogonia; type B spermatogonia B. Secondary spermatocytes; primary spermatocytes C. Primary spermatocytes; spermatids D. Spermatogonia; primary spermatocytes E. Spermatids; spermatozoa
The anatomic features of the respiratory membrane that make alveolar gas exchange so efficient are
A. the high degree of moisture and the large ratio of volume to surface area. B. its large surface area and minimal thickness. C. its thinness, high water content, and scarcity of capillaries. D. its hearty thickness and the presence of oxygen transport pumps.
All of the following classes of hormones are secreted by the adrenal cortex except
A. mineralcorticoids. B. glucocorticoids. C. androgens. D. steroid hormones. E. water-soluble peptides.