where are the calcium ions stored in a muscle fibre how do the calcium ions affect the process of - Biology - Locomotion and Movement

Question

where are the calcium ions stored in a muscle fibre? how do the
calcium ions affect the process of muscle co traction?

Jyotsana. · Accepted Answer

Calcium ions are stored in the endoplasmic reticulum of the muscle
fiber

Calcium ions bind to the calcium binding site of the troponin
molecule on actin filament exposing the active site for myosin head
on actin filament

This enables Myosin heads to bind with actin and slide actin over
the length to bring about contraction

where are the calcium ions stored in a muscle fibre? how do the calcium ions affect the process of muscle co traction?