Triceps is a kind of extensor muscle.

Assertion: Triceps is said to be an extensor muscle for elbow joint. Reason: Triceps relaxes durings extension of forearm at the elbow joint.

Bicep is a/ an extensor muscle.

What kind of muscle fibres are richly found in the extensor muscles of the back? What characteristics enable these fibres to serve their purpose?

Differentiate between flexor muscle and extensor muscle.

(True/false) The flexor and extensor muscle of the arm are antagonistic muscles.

Give an example of an Extensor mucles.

Assertion. The extensor muscles of the human back remain in sustained contraction to maintain erect posture against gravity. Reason. The extensor muscles are rich in red muscle fibres with abundant mitochondria and myoglobin.

Give a brief account of three kinds of muscles.

Triceps helps in: 1.Extension 2.Flexion 3.Abduction 4.Adduction