What is the role of calcium in muscle contraction?
a. Its binding...

Question

What is the role of calcium in muscle contraction?
a. Its binding to a regulatory protein causes the protein to move, exposing actin binding sites to the myosin heads.
b. It provides energy for contraction.
c. It blocks contraction when the muscle relaxes.
d. It forms the heads of the myosin molecules in the thick filaments inside a muscle fiber.

Accepted Answer

Hello everyone and welcome to today's video. So what happens when a settle Colleen or a narrow transmitter binds to its receptor on muscle cells? But as it turns out the effect of a neurotransmitter really depends on the receptor. However, the receptor of a settle Colleen on muscle cells is excitatory. So as Cheryl Colin is going to have an excitatory effect leading to action potentials. Now, how do we start these action potentials? This is something that you can recall from previous videos. We start by the deep polarization of the cell. And how do we actually get the cell to become the polarized? How do we get this interior of the cell to become more positive while we do that by opening these sodium channels by opening these sodium channels, the cells become the polarized which leads to an action potential. And this is the effect that has settled Colleen is going to have when it is bound to receptors on muscle cells. Due to that answer choice A is going to be the correct answer to our question. I really hope this video helped you and I have to see you on the next one

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