n potential on the 15 al is propagated along the sarcolemma and down 14 causing voltage gated 13 channels on the 20 to open the

Question

n potential on the 15 al is propagated along the sarcolemma and down 14 causing voltage gated 13 channels on the 20 to open the rapid coplasm Initiates the 22 cycle In the first step calcium lons bind to 28 causing 12 to shift off of the 25 on 19 In the to the active site forming a 35 In the third step the myosin head 32 pulling actin toward the 38 of the 24 this tension e 8 The final step involves the binding of 10 to the myosin head promoting 30 from actin subsequent hydrolysis of ATP d to it s starting position thus preparing it for the next crossbridge formation and powerstroke As long as sarcoplasmic calcium the active sites on actin will remain uncovered and crossbridges will continue to form maintaining tension within the muscle motor neuron stops releasing ACh or when calcium is actively resequesterd into the sarcoplasmic reticulum and the active sites myosin Because the myofilaments slide past one during the contraction cycle we refer to this as the 9 theory of muscle osin ATPase isoform an abundance tochondria ormed at a constant angular velocity ross a wide range of resting lengths muscle ts low to moderate intensity work with umpti e sarcomere length 21 Name 14 0 m 35 17 23 Share Wimberl 6 DOWN 1 muscle contraction during which there is no change in the length of the muscle 20 3 recruitment of these which vary in size permit graded skeletal muscle contractions lengthening phase of an Isotonic contraction 23 possess a slow myosin ATPase isoform many mitochondria and significant myoglobin 26 glycolysis results in the production of lactic acid Intermediate aberley 39 11 29 30 energy system 36 the phase of an isotonic contraction during which resistance is overcome and the muscle shortens 32 25 12 15 Muscle Physiology 24 27 10 A 36 18 F 40 TET N 31 33 38 7 19 34 16 WAT 28 WIC 13 TH Ranna Biology 22 37

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