Question

this muscle allows you to do a \pull-up,\ or pull yourself up from a hanging position.
○ deltoid
○ triceps brachii
○ biceps brachii
○ biceps femoris

Explanation:

• The deltoid primarily moves the shoulder in abduction (lifting arm out to the side), not pull-up motions.
• The triceps brachii is an extensor of the elbow, used for pushing movements, not pulling.
• The biceps brachii flexes the elbow and supinates the forearm, which is a key muscle for pulling the body upward during a pull-up.
• The biceps femoris is a leg muscle (hamstring), unrelated to upper-body pull-up movements.

Answer:

biceps brachii