The Duration of ACh Activity at Postsynaptic Receptor Sites Is

question 1

Multiple Choice

The duration of ACh activity at postsynaptic receptor sites is limited by

• A) a high concentration of AChE in the synaptic cleft.
• B) a high concentration of intracellular AChE in the presnaptic terminal.
• C) a large number of reuptake receptors on the pre-synaptic membrane.
• D) the proximity of glial cells that absorb the ACh .
• E) the size of vesicles released from the presynaptic terminal.

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