Q.

Regarding synaptic structure / function:

A. small clear vesicles in the presynaptic tunnel contain catecholamines
B. tetanus toxin causes spastic paralysis by blocking release of ACh at NMJ
C. chemical mediators located in ???? of presynaptic fibres contain one-way conduction of impulses
D. the EPSP is an all-or-none response
E. An I-PSP can be produced by localised increase in membrane permeability to Cl-
Answer» C. chemical mediators located in ???? of presynaptic fibres contain one-way conduction of impulses
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