If you can use any letters, it would have to be 2 lower case letters such as tt
Calcium ions presents Ca+ binds to troponin which makes tropomyosin move out of way for myosin to attach. Cross-bridge attaches. ATP breakdown provides energy to ready the myosin head for a power stroke. Myosin head attaches to exposed binding site on actin and the power stroke is accomplished. Cross-bridge (Myosin head) springs from raised position and pulls on the actin filament. Cross bridges break, ATP binds to Cross-bridge (but is not yet broken down) Myosin heads are released from actin. As long as calcium ions and ATP are present, this walking continues until the musle fiber is fully contracted. Hope this helps!
Answer:
sup bus down totoan or nle top shootasup bus down totoan or nle top shootasup bus down totoan or nle top shoota
Explanation:
Maybe visceral muscles ( found in the stomach, intestines and the blood vessels )
I THINK ITS B. HOPE I HELPED
