Examlex
Which of the following provides the most detailed three-dimensional view of the structure of the living human brain?
Substance P
A peptide neurotransmitter released by certain sensory neurons in pain pathways; signals the central nervous system regarding pain; also stimulates other structures, including smooth muscle in the digestive tract.
Neurotransmitter
Chemical substances released from neurons that transmit signals across a chemical synapse to affect other neurons, muscle cells, or gland cells.
Biological Processes
The vital processes occurring in living organisms, necessary for maintaining life, including growth, reproduction, and metabolism.
Neurotransmitters
Neurotransmitters are chemical messengers that transmit signals across a chemical synapse from one nerve cell to another, or to a muscle or gland cell.
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