Carotene is found:
a. stratum corneum
b. stratum granulosum
c. hypodermis
d. both a and c
Answer: d. both a and c
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In all organisms, the basic unit of structure and function is
A. the molecule. B. the cell. C. the atom. D. the macromolecule.
During strenuous exercise, muscles may not be supplied with enough oxygen, causing a shift in metabolism resulting in the breakdown of pyruvic acid to lactic acid. This change in metabolism is called the
A. lactic acid threshold. B. glycogenic threshold. C. aerobic threshold. D. pyruvic acid threshold.
The basic difference between spermatogenesis and oogenesis is that ________
A) in oogenesis, one mature ovum is produced, and in spermatogenesis four mature sperm are produced from the parent cell B) during spermatogenesis two more polar bodies are produced C) the mature ovum is n, while the sperm is 2n D) spermatogenesis involves mitosis and meiosis, but oogenesis involves meiosis only
What is the net filtration pressure of the glomerular capillaries?
A. 15 mm Hg inward B. 10 mm Hg inward C. 15 mm Hg outward D. 10 mm Hg outward