Muscular System P.E

Question 1

What happens in an antagonistic muscle pair?

Answer 1

One muscle contracts and flexes, the other muscle relaxes and lengthens.

Question 2

The muscle that is contracting, what is it called?

Answer 2

Agonist

Question 3

The muscle that is relaxing, what is it called?

Answer 3

Antagonist

Question 4

Name five antagonistic pairs

Answer 4

Triceps and Biceps
Hamstrings and Quadriceps
Gastrocnemius and Tibials anterior 
Hip flexor and Gluteals 
Pectoralis major and Latissimus dorsi

Question 5

What is isotonic concentric contraction?

Answer 5

This involves the muscle shortening. The muscle move closer together and the muscle becomes fatter.

Question 6

What is isotonic eccentric contraction?

Answer 6

This involves the muscle lengthening whilst it is under tension. The origin and insertion move further away from each other. An eccentric contraction provides the control of a movement on the downward phase and it works to resist the force of gravity.

Question 7

What is isometric contraction?

Answer 7

This involves a muscle producing tension but staying the same length. This occurs when the body is fixed in one position.