Refer to the accompanying figure. Which of the following hormones is secreted by the adrenal cortex?
a. 1
b. 2
c. 4
d. 6
e. 8
c
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A sick person often has a fever, which can inhibit the growth of bacteria because
A) bacteria reproduce more rapidly at higher body temperature. B) enzymes do not function as well at temperatures other than the optimal temperature. C) the higher temperature increases the activity of lyases. D) sweating removes prosthetic groups from biological enzymes. E) fever blocks synthesis of proteins in the bacterial nucleus.
What do the letters D-N-A stand for?
A) Dioxyribonucleic acid B) Dioxyribonuclear acid C) Deoxyribonucleic acid D) Deoxyrobonuclear acid
Cytotoxic T cells destroy cancerous cells by
A. releasing vesicles containing perforin. B. opsonization. C. activating natural killer cells. D. secreting cytokines. E. forming the membrane attack complex.
Which of the following is an incorrect pairing?
A) electrolytes; anions B) synthesis; endothermic C) hydrolysis; hydrogen bonds D) catabolism; exothermic E) dehydration; anabolism