Question

• the triceps brachii muscle is not
• triceps brachii and serratus anterior are known as the boxer’s muscles because these muscles deliver the

straight - arm punch.

fill in the blank:
the triceps brachii is ____ times the size of the biceps brachii.
the medial head is made up of primarily of ____ twitch muscle fibers. the lateral head is mainly
____ twitch muscle fibers and the long head is a mixture of both fast and slow twitch fibers.

Explanation:

The triceps brachii is generally about 2 times the size of the biceps brachii. The medial head of the triceps brachii is mainly slow - twitch muscle fibers, the lateral head is mainly fast - twitch muscle fibers.

Answer:

2; slow; fast