Which of the following terms describes a chemical substance released from nerve endings transmitting across synapses to other nerves?

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A neurotransmitter is a chemical substance released from nerve endings that transmit across synapses to other nerves. Cerebral spinal fluid is a clear liquid that surrounds and cushions the brain and spinal cord. Tissue plasminogen activator is an enzyme that dissolves blood clots. Alpha-fetoprotein is a protein produced by the liver and yolk sac of a fetus.

Which of the Following Terms Describes a Chemical Substance Released