The cells active in both innate and adaptive immunity develop from common pluripotent precursors in the bone marrow called
A) B cells.
B) killer cells.
C) stem cells.
D) leukocytes.
Answer: C
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Of the following, which is the MOST common AIDS-associated opportunistic disease?
A) Pneumocystis carinii pneumonia B) cryptosporidiosis C) histoplasmosis D) cryptococcosis
Which of the following might be expected to increase as a result of predation?
A. competition among prey species B. the availability of resources and niches C. prey population densities D. niche divergence E. extinction of prey species due to competitive exclusion
Insulin directly affects the
a. secretion of saliva. b. storage of proteins. c. secretion of pancreatic juices. d. metabolism of glucose. e. utilization of fat reserves
The capsules of Streptococcus mutans, and the fimbriae of Neisseriae gonorrhoeae and enteropathogenic E.coli are examples of:
a. receptors b. toxins c. adhesins/ligands d. cytokines