Which of the Following is Not a Pennate Muscle

Question

Which of the following is not a pennate muscle?
A) rectus femoris
B) extensor digitorum longus
C) deltoid
D) pectoralis
E) All of the answers are correct.

Accepted Answer

The pectoralis muscle is not a pennate muscle; it is a convergent muscle. Pennate muscles have fibers that attach obliquely to their tendons, while convergent muscles have fibers that converge from a broad origin to a single tendon.