BSCI 201 Lecture Notes - Lecture 24: Axon Terminal, Sarcolemma, Motor Neuron
8 Nov 2016
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Motor neuron is excited (activated) its electrical signals called action potentials travel to the axon terminals: axon terminals- the neurotransmitter acetylcholine (ach) is released into the neuromuscular cleft. Has two binding sites: atp binding site, actin binding sites. When atpase hydrolyses (splits), atp is made into adp+pi (atp makes this reaction happen), and this is still bound to the myosin globular head. Once it is activated, it then binds to its site on the actin on a right angle. The activated myosin globular head bound to its site on actin is referred to as the. Atp binds to the atp binding site on the myosin globular head) Cross bridge is destroyed myosin globular head detaches from its binding site on the actin. If atp demand of a skeletal muscle is greater than the rate of atp production, the skeletal muscle contract is termed msucle fatigue. Atp deficit the demand is greater than production.
