Transduction refers to conversion of ________
A) receptor energy to stimulus energy
B) stimulus energy into energy of a graded potential
C) presynaptic nerve impulses to postsynaptic nerve impulses
D) afferent impulses to efferent impulses
B
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Match the term with its description (answers may be used more than once).
1. highly branched cells that transfer nutrients between blood vessels and neurons 2. specialized immune cells that are confined to the CNS 3. cells that form supportive capsules around cell bodies .4 cells that create a selectively permeable epithelial layer to separate fluid compartments of the CNS 5. cells in the CNS that form myelin 6. cells in the PNS that form myelin 7. cells that are a source of neural stem cells 8. cells that myelinate several axons 9. cells that myelinate only one axon each; multiple cells per axon A. ependymal cells B. astrocytes C. satellite cells D. Schwann cells E. oligodendrocytes F. microglia
The capillary vessel walls are more permeable than the lymphatic vessel walls
Indicate whether the statement is true or false
What prevents food from entering the nasal passages during swallowing?
a. elevation of the uvula b. contraction of the pharyngeal muscles c. positioning of the tongue d. tight apposition of the vocal cords over the glottis e. elevation of the epiglottis over the nasopharynx
Sensory receptors that release neurotransmitters in response to receptor potentials are called ______ receptors
A. direct B. indirect C. secondary D. primary