New York State Chemistry RegentsNew York State Earth Science Regents

Living Environment Regents June 2004 Question 36 PDF Print E-mail
Organization of Life


Correct Answer: (1) Nerve cell X is releasing receptor molecules.

Substance A is a neurotransmitter. It is a chemical messenger released from the synaptic terminal of a neuron (nerve cell X) at a chemical synapse that diffuses across the synaptic cleft and binds to and stimulates the post synaptic cell (nerve cell Y).


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