10. Muscles

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

Which of these thigh muscles causes movement at the hip joint?

a. Rectus femoris

b. Biceps femoris

c. Vastus lateralis

d. Semitendinosus

Which of the following inserts on the arm?

a. Biceps brachii

b. Triceps brachii

c. Trapezius

d. Latissimus dorsi

In addition to acting to flex the spine and compress the abdominal contents, the abdominal muscles are extremely important in protecting and containing the abdominal viscera. What is it about the arrangement of these muscles that makes them so well suited for their job?

What is an aponeurosis? Give two examples.

Distinguish between

a. Direct and indirect muscle attachments and

b. A tendon and an aponeurosis

Explain the general relationship between the muscles that flex and extend the wrist, including their location on the body.

What three functions are accomplished by the muscles of the pelvic floor?

On which bones do the four rotator cuff muscles originate and insert?

A(n)____develops when an organ protrudes through an abnormal opening.

Elongated bursae that reduce friction and surround the tendons that cross the posterior and anterior surfaces of the wrist form___.

Assume you have a 10-lb weight in your right hand. Explain why it is easier to flex the right elbow when your forearm is supinated than when it is pronated.

Mr. Ahmadi, an out-of-shape 45-year-old man, was advised by his physician to lose weight and to exercise on a regular basis. He followed his diet faithfully and began to jog daily. One day, while on his morning jog, he heard a snapping sound that was immediately followed by a severe pain in his right lower calf. When his leg was examined, a gap was seen between his swollen upper calf region and his heel, and he was unable to plantar flex that ankle. What do you think happened? Why was the upper part of his calf swollen?