Place the events associated with each stage of infectious disease in the correct order with regard to time._____Prodromal stage _____Incubation period _____Convalescence _____
Illness period
Fill in the blank(s) with the appropriate word(s).
2, 1, 4, 3
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If a cell had a chromosome number of four,
after anaphase but before the cytoplasm divides, how many chromosomes does the cell have?
a. 2 b. 4 c. 8 d. 16 e. none of these
Where do antigen-presenting cells interact with T cells?
a. the thymus gland
b. the pituitary gland c. the lymph nodes d. the adrenal glands e. the bone marrow
The host provides environment. Microorganisms feed on undigested food. Host feeds on digested food by microorganism. This relationship is known as:
A. mutualism B. Disease C. Colonization D. Commensalism E. Parasitism
African sleeping sickness is fatal if not treated because the parasite
A) evades destruction by the immune system by changing surface antigens. B) produces a toxin which binds irreversibly to neurons. C) is an intracellular parasite in RBC's, where they are not detected by the immune system. D) reproduces so fast there is no time for an immune response to develop. E) produces a non-immunogenic toxin the immune system cannot neutralize.