Which organ removes most of the worn-out red blood cells from the circulation?
a. bone marrow.
b. kidney.
c. large intestine.
d. pancreas.
e. spleen.
E
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Curvatures of the spine produce all of the following except
A. lordosis. B. scoliosis. C. kyphosis. D. increased height.
Parathyroid hormone does all of the following except
A) stimulate osteoclast activity. B) inhibit osteoblast activity. C) build up bone. D) stimulate the formation and secretion of calcitriol at the kidneys. E) enhance the reabsorption of calcium at the kidneys.
Which of the following could result from an overly zealous exercise program?
A. Polycythemia B. Hypoplastic anemia C. Mononucleosis D. Leukopenia E. Leukocytosis
The pleurae are vital to the integrity of the lungs because ________.
A) they contain cilia that protect the lungs B) they control the volume of the lungs C) they maintain the proper temperature of the lungs during sleep D) they produce a lubricating serous secretion, allowing the lungs to glide over the thorax wall during breathing