Triatoma, commonly called "kissing bugs," are vectors of
A) African sleeping sickness.
B) Chagas' disease.
C) Cyclosporiasis.
D) Leishmania.
E) schistosomiasis.
B
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Physician Edward Jenner promoted the use of cowpox, a harmless pathogen related to the dangerous smallpox virus, as a vaccination to provide patients immunity from future smallpox epidemics. This is an example of
A. developing high levels of complement. B. passive immunity. C. developing high levels of interferon although Jenner did not realize these diseases were viral. D. active immunity. E. an inflammatory response that decreased the IgE production and increased T cells.
What part of the neuron receives nerve impulses and acts as an "antenna"?
A) axon B) cell body C) dendrite D) nerve
Edward Jenner was the physician who first used cowpox to vaccinate individuals against smallpox
Indicate whether the statement is true or false
Membranes of thermophilic bacteria are stabilized by phospholipids with ________.
A. fatty acids that tend to be more saturated B. fatty acids that have more double bonds C. fatty acids that have lower molecular weights D. All of the choices are correct.