The ____ regulates the amount of light that enters through the diameter of the pupil
a. cornea
b. iris
c. retina
d. sclera
b
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In a child, a vitamin D deficiency results in ________, whereas a vitamin A deficiency results in ________.
A. rickets; retardation of bone development B. pituitary dwarfism; rickets C. excess calcium absorption; osteomalacia D. soft bones; rickets
The term lymphadenopathy refers to
A) a congenital lack or malformation of lymph nodes. B) a chronic or excessive enlargement of lymph nodes. C) accumulations of lymph in the tissue space. D) the lack of lymphocytes in peripheral circulation. E) increased numbers of circulating lymphocytes.
A solution with a pH of 6:
a. is an acid b. is a base c. has 10 times more H+ ions than a solution with a pH of 5 d. both A and C above
The cell type that is specialized to communicate with other cells and control their activities is
A. Epithelial cells B. Muscle cells C. Connective tissue cells D. Nerve cells