Question

muscle contraction interactive and video
which of the following statements is true?
the triceps and biceps bend your knees.
the triceps and biceps are both flexors.
the biceps and triceps are both extensors.
the biceps is an extensor and the triceps is a flexor.
the triceps is an extensor and the biceps is a flexor.
save score: 100% submit response

Explanation:

• The biceps brachii is a flexor muscle (it bends the elbow joint).
• The triceps brachii is an extensor muscle (it straightens the elbow joint).
• The triceps and biceps are located in the upper arm, not related to knee - bending (knee - bending is mainly related to muscles like the hamstrings).
• Flexors bend joints and extensors straighten joints, so they can't be both flexors or both extensors.

Answer:

The triceps is an extensor and the biceps is a flexor.