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Unformatted text preview: 2. Action potential is generated on the motor end plate and throughout the T tubules. Receptors on the motor end plate, a highly folded region of the sarcolemma, initiate an action potential. The action potential travels along the sarcolemma throughout the transverse system of tubules. 3. Sarcoplasmic reticulum releases Ca 2+ . As a result of the action potential throughout the transverse system of tubules, the sarcoplasmic reticulum releases Ca 2+ . 4. Myosin cross bridges form. The Ca 2+ released by the sarcoplasmic reticulum binds to troponin molecules on the actin helix, prompting tropomyosin molecules to expose binding sites for myosin cross-bridge formation. If ATP is available, muscle contraction begins....
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.
- Fall '10