Antagonistic muscle action

Which one of these occurs when the leg bends at the knee whilst running?

Muscles work in antagonistic pairs.

State the role of the agonist.

Figure 2 shows an individual lifting a weight.

Use Figure 2 to help you answer Questions 9.1 to 9.2.

Identify the joint action taking place at the elbow as they move the weight from A to B.

Identify the type of isotonic muscle contraction that is taking place at the elbow as they move the weight from A to B.

Figure 1 shows muscles in the body.

Identify the muscles labelled A, B and C in Figure 1.

Name two bones located at the head/neck.

Explain how muscles and bones work to produce movement.

Figure 3 shows an individual performing a push-up.

Use Figure 3 to help you answer Questions 10.1 to 10.3.

Identify the joint action taking place at the elbow during the upward phase (A to B) of the push-up.

Identify the main agonist at the elbow during the upward phase (A to B) of the push-up.

Identify the type of isotonic muscle contraction taking place at the elbow during the upward phase (A to B) of the push-up.

Which one of these describes an isometric contraction?

Figure 2 shows an athlete in two different positions (A and B) as the athlete performs a tricep dip.

Figure 2

Use Figure 2 to help answer the following questions.

Identify the joint action taking place at the elbow as the arm moves from A to B.

Identify the main antagonist at the elbow as the arm moves from A to B.

Identify the type of isotonic muscle contraction that is taking place at the elbow as the arm moves from A to B.

Figure 2 shows a person performing a wall sit.

Identify the type of muscular contraction taking place in the legs in Figure 2.

Justify your answer to Question 8.1.

Figure 3 shows a basketball player in two different positions (A and B) as they perform the jump shot.

Use Figure 3 to help you answer Questions 13.1 to 13.3.

Identify the joint action taking place at the knee as the basketball player moves from A to B.

Identify the main agonist at the knee as the basketball player moves from A to B.

Identify the type of muscle contraction that is taking place at the knee as the basketball player moves from A to B.

Figure 1 shows an athlete in two different positions (A and B) as he performs a bicep curl.

Use Figure 1 to help you answer Questions 09.1 to 09.3.

Identify the joint action taking place at the elbow as the arm moves from A to B.

Identify the main antagonist at the elbow as the arm moves from A to B.

Identify the type of muscle contraction that is taking place at the elbow as the arm moves from A to B.

What is the role of a tendon?

Muscles work in pairs.

Outline the role of the antagonist.

Name two major muscle groups that allow the leg to move at the hip.

Define ‘adduction’.

Use a sporting example in your answer.

Name the type of joint where adduction can take place.

Define ‘isometric contraction’.

Use a sporting example in your answer.

Figure 2 shows an individual performing a push-up.

Using Figure 2, identify what type of muscle contraction is taking place in the arms during the downward phase (A to B) of the push-up.

Using Figure 2, identify the main agonist in the arm during the downward phase (A to B) of the push-up.

Using Figure 2, identify the lever system working at the elbow during the upward phase (B to A) of the push-up.

Draw a fully labelled diagram in the box below to show the type of lever identified in your answer to Question 07.3.