CSB332H1 Study Guide - Midterm Guide: Squid Giant Synapse, Stellate Ganglion, Synaptic Vesicle

86 views7 pages

Document Summary

Release of neurotransmitter stimulus: depolarization of the nerve terminal. Release occurs as a result of ca entry into the terminal through voltage-activated ca channels. Invariably, a delay of about 0. 5 milliseconds intervenes between presynaptic depolarization and transmitter release because : the time taken for ca channels to open, time required for ca to cause transmitter release. Transmitter is secreted in multimolecular packets (quanta), each containing several thousand transmitter molecules. 1-300 quanta are released almost synchronously, depending on the type of synapse, in response to an ap. At rest, nerve terminals release quanta spontaneously at a slow rate, giving rise to spontaneous miniature synaptic potentials (minis) At rest, there is also a continuous, nonquantal leak of transmitter from nerve terminals. One quantum of transmitter corresponds to the contents of one synaptic vesicle and comprises several thousand molecules of a low-mw transmitter.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers

Related Documents

Related Questions