Circulating antibodies are produced by
A. all cells in the immune system.
B. phagocytes alone.
C. B cells.
D. T cells alone.
E. macrophages.
C
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Type ________ hypersensitivity is generally called a cytolytic or cytotoxic reaction because it results in the destruction of host cells, either by lysis or toxic mediators.
Fill in the blank(s) with the appropriate word(s).
The short, numerous appendages used by some bacterial cells for adhering to surfaces are called ________.
A. flagella B. pili C. fimbriae D. cilia E. periplasmic flagella (axial filaments)
Draw a duplicated chromosome. Now, label each part of the chromosome with both its function and its
identity. What will be an ideal response?
Select the statement(s) associated with heavy exercise in high heat, with lots of sweating and no eating or drinking. (Select all that apply.)
a. Activation of the parasympathetic nervous system b. High plasma levels of aldosterone c. High plasma levels of atrial natriuretic peptide d. High plasma levels of vasopressin