What does sarcoplasmic reticulum do?

Answer 1

The Sarcoplasmic Retiulum releases calcium ions that will cause troponin/tropomyosin complex to move. This exposes the binding sites on actin and allows the cross-bridges of myosin to bind to the actin binding sites.

Answer 2

The major function of the sarcoplasmic reticulum in muscle contraction is to regulate intracellular calcium concentration. It is a system of membrane-bound tubules that surrounds the muscle fibrils. it is a specialized form of smooth endoplasmic reticulum. The calcium ions initiates and promotes the attractive forces between the contracting filaments called actin and myosin to slide/ interdigitate between one another.

Answer 3

Sarcoplasmic reticulum is the endoplasmic reticulum of the muscle cell

it contains calcium ions in it and the calcium ions are responsible for the contraction of the muscle

At the time when the nerve signal reaches the neuromuscular junction i.e. the site at which neuron and the muscle membranes meet, the action potential travel to the cell through transverse tubules that are located near Sarcoplasmic reticulum

action potential leads to the opening of the calcium channels and the calcium comes in the sarcoplasm i.e. Cytoplasm of muscle cells it helps in contraction of the action and myosin filament in the muscle cell and then rapidly come back into the Sarcoplasmic reticulum to relax the muscle

1. regulate intracellular calcium concentration

Answer 4

When stimulated it releases calcium into the cell

Answer 5

intracellular levels of Ca2+

Answer 6

-intracellular levels of Ca2+