Which one of the following plays the most significant role in regulating the distribution of blood into tissues?
A) arteries
B) veins
C) capillaries
D) arterioles
E) venules
D
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In which of the following plants is the
gametophyte larger and longer-lived than the sporophyte?
a. mosses b. conifers c. ferns d. flowering plants e. none of these
Which of the following is TRUE of cystic fibrosis?
a. It results in reduced mucus production. b. It leads to increased bacterial lung infections. c. It affects the amino acid alanine. d. It causes excess water to leave the cells. e. It most often affects the liver.
Why don't corneal transplants (in the eye) provoke an immune response?
a. corneas are not cellular structures b. corneal cells secrete a chemical to trigger apoptosis in attacking lymphocytes c. lymphocytes recognize all corneas as "self" d. there are no lymphocytes in the eye e. corneal cells resemble lymphocytes
Which statement is false concerning STDs?
A) Most viral STDs can never be eliminated from the body. B) Permanent infertility can be the result of an untreated STD. C) STDs are routinely tested for during all physical examinations. D) Bacterial STDs can be treated with antibiotics.