The targets of cytotoxic T cells most frequently are host cells infected with:
a. bacteria
b. fungi
c. viruses
d. parasites
e. mold
c
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Conduction by local current flow
a. occurs in unmyelinated fibers. b. is faster than propagation of an action potential in myelinated fibers because myelin acts as an insulator to slow down the impulse. c. involves current flowing locally between the active and adjacent inactive areas, thereby bringing the inactive areas to threshold so that they too become active (i.e., have an action potential). d. both (a) and (c) above. e. all of these answers.
This connective tissue consists of large round densely packed cells with the nucleus pushed to one side
A) hyaline cartilage B) blood C) reticular D) adipose
The structure that connects the two cerebral hemispheres is the
A) suprachiasmatic nucleus. B) hippocampus. C) corpus callosum. D) basal nuclei. E) gray "H."
An increase in the permeability of the cells of the collecting tubule to water is due to a(n) ________
A) increase in the production of ADH B) decrease in the concentration of the blood plasma C) increase in the production of aldosterone D) decrease in the production of ADH