All of the following are true of the primary response to antigen exposure except that
A) it depends on antigen triggering the appropriate B cell.
B) it requires B cell differentiation into plasma cells.
C) it is delayed by the memory cell stage.
D) circulating antibodies undergo a gradual, sustained rise.
E) it peaks 1 to 2 weeks after the initial exposure.
Answer: C
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Answer the following statement(s) true (T) or false (F)
1. Incompatibility of one person's blood with another results from the action of plasma antibodies against the RBCs' antigens. 2. Circulating WBCs spend most of their lives in the bloodstream. 3. Lymphocytes secrete antibodies, coordinate action of other immune cells, and serve in immune memory. 4. Monocytes differentiate into large phagocytic cells.
Granulocytes form in
A) the intestines. B) the spleen. C) the thymus. D) red bone marrow. E) yellow bone marrow.
A condition in which stimuli occur so rapidly that there are no intervening relaxations between contractions is called
A. complete tetanus. B. all or none tetanus. C. incomplete tetanus. D. treppe. E. involuntary paralysis.
Clinically, dystrophin is the most important noncontractile protein to occur in muscle fibers
Indicate whether the statement is true or false