why contraction and relaxation occur in muscular tissue
Answers
Answered by
0
A cross-bridge forms between actin and the myosin heads triggering contraction. ... A muscle also can stop contracting when it runs out of ATP and becomes fatigued .Relaxation of a Muscle Fiber. Ca++ ions are pumped back into the SR, which causes the tropomyosin to reshield the binding sites on the actin strands.
Similar questions