All of the following are true of the primary response of humoral immunity except that
A) it depends on antigen triggering the appropriate B cell.
B) it requires B cell differentiation into plasma cells.
C) it depends on memory B cells.
D) circulating antibodies undergo a gradual, sustained rise.
E) it peaks 1 to 2 weeks after the initial exposure.
C
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The series of internal compartments of a muscle that contains a bundle of muscle fibers is a ________.
Fill in the blank(s) with the appropriate word(s).
The main advantage of antagonistic control of visceral organs by the sympathetic and parasympathetic nervous systems is it
a. saves energy. b. economizes on volume requirements since organs can constrict when they're not being used. c. allows precise regulation of the activity of the organs so innervated. d. all of these. e. none of these.
Charlie has a break in the shaft of his thigh bone. He broke the:
A) epiphysis. B) diaphysis. C) epiphyseal plate. D) articular cartilage.
The membrane that lines the lumenal surfaces of the digestive, respiratory, urinary, and reproductive tracts consists of ________.
A. simple squamous epithelium and dense irregular connective tissue B. epithelium and lamina propria C. areolar and dense irregular connective tissue D. simple squamous epithelium and areolar tissue E. areolar tissue and lamina propria