Skeletal Muscle Movement

Question 1

What is muscle insertion?

Answer 1

the part of the muscle that is pulled towards the other side during contractions

Question 2

What is muscle origin?

Answer 2

the immovable end of the muscle, where the muscle originates from, and it is typically the portion of the joint that doesn’t move

Question 3

What is an example of muscle insertion?

Answer 3

the insertion of the bicep is on the radius

Question 4

What is an example of a muscle origin?

Answer 4

the bicep originates on the scapula

Question 5

What are contractions?

Answer 5

when a muscle is stimulated and the muscle fibers fire (spring into action) causing them to become taught

Question 6

What are the 3 types of contractions?

Answer 6

concentric, eccentric, and isometric

Question 7

What is concentric contraction?

Answer 7

when the muscle becomes taught and strains against a stimulus while trying to shorten, and it is a contraction that occurs while the insertion is travelling closer to the origin

Question 8

What are some examples of concentric contraction?

Answer 8

bicep curls, tricep extension, and bench pressing while the weight is going up

Question 9

What are eccentric contractions?

Answer 9

when a muscle is firing and fighting against a stimulus while elongating, and the muscle’s insertion is being pulled further from its origin while stimulated

Question 10

What are some examples of eccentric contraction?

Answer 10

bench pressing while the weight is going down, leg curls as the heels move away from the glutes, and the bottom half of a bicep curl

Question 11

What is isometric contraction?

Answer 11

when a muscle is firing and resisting a stimulus while not moving, and the insertion of the muscle doesn’t move further from or closer to the origin

Question 12

What are some examples of isometric contraction?

Answer 12

planks, farmer’s carry, and wall sits (or any exercise where you’re just holding a weight and resisting its move)

Question 13

What are the benefits of concentric contractions?

Answer 13

can help build strength, improve power, and plays a part in speed production

Question 14

What are the benefits of eccentric contraction?

Answer 14

great for increasing muscle mass/size, helps you get stronger in difficult areas/helps you control movements better, and it can help prevent injury

Question 15

What are the benefits of isometric contractions?

Answer 15

helps with balance, structural support, and can reduce the risk of injury

Question 16

What are prime movers?

Answer 16

a prime mover is the muscle that is the MOST responsible for a movement at a joint

Question 17

What is an example of a prime mover?

Answer 17

the lateral deltoid is most responsible for abduction at the shoulder

Question 18

What is another name for prime movers?

Answer 18

agonists

Question 19

What are synergists?

Answer 19

muscles that contract and assist the prime mover, and they hold the joint steady and optimize the prime movers’ ability to move the joint

Question 20

What are antagonists?

Answer 20

they resist the movement of a prime mover and can pull in the other direction, antagonist muscles need to relax in order to allow smooth movements in the body, if agonist and antagonist muscles contract at the same time the joint won’t move

Question 21

What are some examples of antagonists?

Answer 21

bicep curls and tricep curls