Calcium is important to homeostasis because
a. it plays a role in the absorption of vitamin D from the digestive tract
b. it maintains the proper excitability of nerves and muscles
c. it stimulates osteoblasts to lay down bone
d. of both a and b
e. of both b and c
B
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If excess water enters the body,
A. osmoreceptors in the brain swell. B. more water is reabsorbed from the renal tubules. C. ADH release increases. D. the collecting duct becomes more permeable to water.
Pulse pressure ________
A) is the large difference between the apical and radial pulses B) refers to alternating surges of pressure in an artery C) is the difference between systolic and diastolic pressure D) can be palpated easily under the chin
High endothelial venules in a lymphoid organ function to:
a. Allow the entry of splenic platelets into the bloodstream b. Attract interstitial macrophages to degenerating red blood cells, as in the spleen c. Enable the exit of lymphocytes from the bloodstream into the tissue parenchyma d. Establish a barrier between the bloodstream and the tissue parenchyma, as in the thymus e. Provide a copious flow of fluid that becomes lymph
Polysaccharides must be broken down to disaccharides in order to be absorbed
Indicate whether the statement is true or false.