Nerve supply - F. Nueromuscular junction- where the nerve...

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Nerve supply A. Resting membrane potential- difference between inside and outside of cell, outside more positive ions, inside more negative ions. B. Action potential- brief change of charges across the membrane 1) stimulation causes positive ions (Na+) to rush inside the cell, moment later they are pumped out C. Motor neurons carry action potentials to cells, start at cord or brain extend into m. fibers, single neuron called motor unit D. synaptic cleft- place where nerve connects to muscle E. Motor end plate- where sacrolemma lines the synaptic cleft
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Unformatted text preview: F. Nueromuscular junction- where the nerve attaches to the muscle. Not directly because there is a gap G. Synaptic vesicles- tiny sacs at end of nerve, they contain acetylcholine (Ach) a neurotransmitter H. When stimulation arrives at terminal end calcium ions stimulate the release of Ach, Ach diffuses across, Ach binds with muscle membrane causes ion channels to open permitting Na ions to flow into the cell causing the muscle fibers to contract...
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This note was uploaded on 09/27/2011 for the course BIOLOGY BSC1085 taught by Professor Harris during the Spring '11 term at Broward College.

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