Question

1) List three agonist muscles that flex the elbow. 2) List one antagonist for elbow flexion. 3) List one muscle that flexes the wrist and allows a human to make a fist. 4) List two muscles that allow extension of the wrist and flaring of the fingers. 5) List one muscle that allows supination of the hand and one muscle that allows pronation of the hand.

Answer 1

Agonist and antagonist muscles: The agonist is a muscle which contracts to cause a movoment while antagonist is the muscle which opposes the movement. For elbow flexion biceps is the agonist muscle and the triceps is the antagonist muscle.

1) Three agonist muscles that flex the elbow are the biceps, brachialis, and brachioradialis.

2) One antagonist for elbow flexion is triceps.

3) Muscle that flexes the wrist and allows a human to make a fist is flexor carpi radialis

4) Two muscles that allow extension of the wrist and flaring of the fingers are extensor carpi radialis longus and extensor carpiradialis brevis

5) One muscle that allows supination of the hand is biceps brachii and muscle that allows pronation of the hand is pronator teres.