10. Muscles

True or False: if false, choose the answer that best corrects the statement.

During a muscle contraction, the origin moves towards the insertion.

The flexor carpi ulnaris is a muscle that adducts and flexes the hand at the wrist. The muscle attaches to both the humerus and the base of the 5th metacarpal. Based on the movement that this muscle performs, which attachment is the origin?

The diagram below shows some of the muscles used for chewing. Using your knowledge of the bones, identify the insertion of the masseter.

Levers make action more versatile by all of the following, except

(a) Changing the location of the muscle's insertion

(b) Changing the speed of movement produced by an applied force

(c) Changing the distance of movement produced by an applied force

(d) Changing the strength of an applied force

(e) Changing the direction of an applied force

The more movable end of a muscle is the

(a) Insertion

(b) Belly

(c) Origin

(d) Proximal end

(e) Distal end

Which of the following muscles attach to the hip bones?

a. Rectus abdominis

b. Rectus femoris

c. Vastus medialis

d. Vastus lateralis

The muscles of facial expression are innervated by cranial nerve

(a) VII

(b) V

(c) IV

(d) VI