Question

Role of calcium in muscle contraction is………………….

a.to break the cross bridges as a cofactor in the hydrolysis of ATP.
b.to bind with troponin, changing its shape so that the actin filament

is exposed.

c.to transmit the action potential across the neuromuscular junction.

d.to re-establish the polarization of the plasma membrane following

an action potential.​

Answer 1

Answer:

option (c)

Explanation:

The muscle contraction cycle is triggered by calcium ions binding to the protein complex troponin, exposing the active-binding sites on the actin.

The muscle contraction cycle is triggered by calcium ions binding to the protein complex troponin, exposing the active-binding sites on the actin.ATP then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.

Hope it helps ☺️

Answer 2

See the attachment for ur answer