Answer:
All the steps are down below!!
Step-by-step explanation:
Step 1 - Motor neuron sends action potential (nerve impulse) to the muscle
Step 2 - acetylcholine (ACh) release from vesicles on motor neuron
Step 3 - ACh binds to receptors on muscle membrane & activates 2nd action potential, now on muscle
Step 4 - Action potential opens active transport pumps of sarcoplasmic reticulum
Step 5 - Ca+2 floods sarcoplasm, AChE degrades ACh
Step 6 - Ca+2 attaches to troponin of TT complex and changes its shape
Step 7 - This shape change pulls tropomyosin away from myosin-binding sites on actin
Step 8 - ATP attaches to ATP binding site on myosin crossbridge
Step 9 - ATP use on myosin head in presence of Mg+ splits ATP into ADP+P which energizes myosin head (swings forward)
Step 10 - P flies off and myosin head binds to binding site on actin
Step 11 - DP is pushed off + myosin head is de-energized (pulling actin forward) non myosin swivels back to resting state
Step 12 - Repeat 8-11 until the Ca+2 comes off the TT complex
Hope this Helps!!