Arm muscles and leg muscles are arranged in antagonistic...

Arm muscles and leg muscles are arranged in antagonistic pairs. How does this affect their functioning? a. It provides a backup if one of the muscles is injured. b. One muscle of the pair pushes while the other pulls. c. A single motor neuron can control both of them. d. It allows the muscles to produce opposing movements.

Transcript

00:01 Okay, you want to answer this question, we have to talk about agonists and antagonistic muscles.

00:06 Okay, so remember that muscles, muscles are attached to bones by tendons.

00:17 Okay, so practically tendons are going to bind these muscles to bone.

00:22 These muscles are going to contract to move our bones by pulling on them, by pulling on them.

00:31 Okay, so, however, these muscles can only pull.

00:34 They cannot patch.

00:39 And this is why they usually work adjoined in pairs.

00:42 One muscle of the pair contracts to move the body part and the other muscle in the pair and then contracts to return the body part back to the original position.

00:52 And muscles that work like this in pairs are going to be called antagonistic pairs.

01:02 For example, if this is one limp, you contract and makes in this...

01:08 Muscle is going to move this direction, and when you contract the other muscle, it is going to move in this direction, returning the muscle back to normal, to normal position.

01:16 Okay? so in an antagonistic muscle pair, as one muscle contracts, the other muscle relaxes, or lengthens.

01:23 For example, when you want to move this muscle in this direction, this muscle here is going to relax, okay, in order for the movement of this muscle to go in this direction.

01:32 And when you want to move the muscle in this direction, you have to relax this muscle here, in order for this direction to be a shift...

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