The kidneys make the final enzyme for synthesis of the hormone _________, which causes increased calcium absorption in the small intestine
Fill in the blank with correct word.
calcitriol
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Layers of bony matrix at the outer and inner surfaces of bone and covered by the periosteum and the endosteum are
A) concentric lamellae. B) osteons. C) Haversian systems. D) interstitial lamellae. E) circumferential lamellae.
Reflexive memories are stored in areas of the
A) cerebellum. B) occipital lobe. C) parietal lobe. D) frontal lobe. E) temporal lobe.
Select the incorrect statement about the plasma membrane
a. cholesterol contributes to its stability. b. membrane proteins are inserted in a lipid bilayer. c. it consists mostly of proteins. d. its lipid bilayer is not a rigid structure. e. membrane carbohydrates are only on its outer surface.
Which may be involved in an autonomic reflex?
A. Smooth muscle contraction B. Secretion by glands C. Cardiac muscle contraction D. All of the choices are correct. E. None of the choices are correct.