A hormone travels from the gland that releases it to the target cell via __________.
A. the bloodstream.
B. nerve axons.
C. the digestive tract.
D. the respiratory tract.
Answer: A. the bloodstream.
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Deficiency of vitamin ___ causes osteomalacia
A) C B) D C) A D) E
Normal interstitial fluid has a PO2 40 mm Hg and PCO2 of 45 mm Hg. As a result,
A) both oxygen and carbon dioxide diffuse into the capillaries. B) both oxygen and carbon dioxide diffuse out of the capillaries. C) no diffusion occurs. D) oxygen diffuses out of the capillaries and carbon dioxide diffuses in. E) oxygen diffuses into the capillaries and carbon dioxide diffuses out.
The term caudal means
A. toward the head. B. nearer the inside or core of the body or an organ. C. toward the tail end of the spine. D. toward the feet. E. farther from the point of attachment.
The two general types of chromosomes are
A. autosomes and allosomes. B. sex chromosomes and allosomes. C. X and Y chromosomes. D. sex chromosomes and autosomes.