What is the role of B cell receptors (BCRs) and T cell receptors (TCRs) in the immune response?
to release chemicals which destroy pathogens
to recognize specific epitopes of an antigen
to combine with haptens so they can stimulate an immune response
to release the cytokines needs for immune cell stimulation
to communicate with lymphocytes and other white blood cells
to recognize specific epitopes of an antigen
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Predict the outcome of being immunosuppressed as it relates to the development of cancer
A. Immunosuppressed individuals are at lower risk of cancer because cytokines produced by the immune system induce cancer. B. Immunosuppressed individuals are at lower risk of cancer because they are more likely to contract infectious diseases. C. Immunosuppressed individuals are at higher risk of cancer because the immune system recognizes and destroys cancerous cells. D. Immunosuppressed individuals are at higher risk of cancer because they bear a higher load of microbes that damage host tissues. E. None of the above.
Which word root means eardrum?
A) ot/o B) tympan/o C) audi/o D) acoust/o
Which of the following behaviors are most strongly associated with bulimia nervosa?
A) a refusal to eat, a refusal to maintain a normal body weight, and a distorted body image B) a regular pattern of binging and purging and an obsession with body weight and shape C) eating only one meal per day D) using food as a reward, eating even when not hungry, and thinking about food throughout the day
The rate at which aging changes take place depends on a combination of ____ factors
a. age and gender b. biological and evolutionary c. genetic and lifestyle d. social and historical e. personal and family