https://padlet.com/karjon679/l8paidpddppm unit 7 en-us 2019-03-08 13:17:37 UTC 2019-03-11 12:22:34 UTC hello@padlet.com karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339275486 2019-03-08 13:18:06 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339275486 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339891898 In event one, a nerve sends a brain impulse through the motor unit down to a neuromuscular junction.]]> 2019-03-11 11:49:25 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339891898 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339896435 The action potential moves down the sarcolemma (muscle cell membrane) and down the T tubules. ]]> 2019-03-11 12:01:34 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339896435 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339898875 A nerve impulse opens calcium gated ion channels and allows calcium to enter and stimulate the ACh, which is released in the clefts]]> 2019-03-11 12:08:25 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339898875 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339899346  ACh binds to a receptor sight and activates voltage gated sodium channels which pumps Na+ in and K+ out causing it to depolarize. ]]> 2019-03-11 12:09:48 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339899346 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339899901  As depolarization spreads it opens voltage gated ion channels and initiated an action potential along the sarcolemma]]> 2019-03-11 12:11:14 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339899901 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339900173 When the concentrations change they open voltage gated K+ pumps which allow Ka+ to diffuse and repolarize.]]> 2019-03-11 12:11:59 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339900173 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339901390 The transmission of the action potential along the T tubules cause adjacent sarcoplasmic reticulum (SR) to release Ca+ which flows into the cytosol.]]> 2019-03-11 12:14:59 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339901390 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339902061  The Ca+ combines with troponin and removes the blocking tropomyosin by changing the shape of the actin so the myosin sites are exposed.]]> 2019-03-11 12:16:39 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339902061 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339902990  Myosin binds to actin forms cross bridges and contraction begins.]]> 2019-03-11 12:18:49 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339902990 karjon679 https://padlet.com/karjon679/l8paidpddppm/wish/339904014 Cross bridge formation: energized myosin head attaches to an actin myofilament forming cross bridge.]]> 2019-03-11 12:21:21 UTC https://padlet.com/karjon679/l8paidpddppm/wish/339904014