synapsing
The definitions used in this glossary of terminology either have been provided by the authors of the articles, or have been extracted wholly or in part, or paraphrased from the following sources: The American Medical Association Encyclopedia of Medicine, Charles B. Clayman, MD, Medical Editor, Random House, New York, 1989; Biotechnology from A to Z, 2d Edition, William Bains, Oxford University Press, New York, New York, 2002; A Dictionary of Genetics, 6th Edition, Robert C. King and William D. Stansfield, Oxford University Press, New York, New York, 2002; Dorland's Illustrated Medical Dictionary, 29th and 30th Editions, W. B. Saunders Company, Philadelphia, 2000, 2003; Genes VII, Benjamin Lewin, Oxford University Press, New York, New York, 2000; The Gale Encyclopedia of Genetic Disorders, Volumes I and II, Stacey L. Blachford, Ed., Thomson Learning, New York, New York, 2002; The Merriam-Webster Dictionary, Merriam-Webster, Inc., Springfield, Massachusetts, 1997; Molecular Biology of the Cell, 3rd Edition, Bruce Alberts, et al., Garland Publishing, 1994; The Random House Dictionary of the English Language, Unabridged Edition, 1966; Webster's Ninth New Collegiate Dictionary, 1991.
DEFINITION:
- synapsing
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The transmission of an impulse from one neuron to another at the site of functional apposition between the neurons, usually by a chemical neurotransmitter (e.g., acetylcholine, norepinephrine, etc.) released by the axon terminal of the excited (presynaptic) cell. The neurotransmitter diffuses across the synaptic cleft to bind with receptors on the postsynaptic cell membrane, and thereby effects electrical changes in the postsynaptic cell which result in depolarization (excitation) or hyperpolarization (inhibition). Synapses also occur at sites of apposition between nerve endings and effector organs (e.g., the neuromuscular junction). A few synapses in the central nervous system are electrical synapses.
Used in 1 Term definition
Used in 1 Term definition