Chapter 11 A&P

This figure shows a palmar view of the hand. What muscle does the number 2 indicate?

! Abductor pollicis brevis

If you had all of your fingers (including the thumb) spread out wide, which muscle or group would bring your thumb toward your first finger?

! Adductor pollicis

There are four muscles of mastication. Select the exception.

! Buccinator

Within which layer of the anterior compartment of the forearm is the flexor pollicis longus located?

! Deep layer

Which muscle is not innervated by the plantar nerve?

! Extensor digitorum brevis

This figure shows the right anterior forearm. What muscle does number 3 indicate?

! Flexor carpi radialis

These figures show the intrinsic muscles of the right foot. What muscle or group does number 1 indicate?

! Flexor digitorum brevis

There are three gluteal muscles. Select the one that is correctly matched with its primary action.

! Gluteus medius: abducts the thigh

You hear a sharp noise to your left causing you to shift your eyes in that direction. Which muscles were responsible for your glance?

! Left eye - lateral rectus, right eye - medial rectus

There are three anterior thoracic muscles. Select the exception.

! Levator scapulae

This muscle extends and rotates the vertebral column toward the opposite side of the body. Its origin is on the sacrum and transverse processes of each vertebra and its insertion is the spinous processes of more superior vertebrae

! Multifidus

All of these muscles, except one, have their origin on the scapula. Select the exception.

! Pectoralis major

This figure shows the muscles of the anterior trunk. What muscle does number 1 indicate?

! Pectoralis major

Which muscle "unlocks" the fully extended knee joint?

! Popliteus

All of these muscles, except one, is innervated by the radial nerve. Select the exception (it is innervated, instead, by the median nerve).

! Pronator teres

The superficial layer of the urogenital triangle contains three muscles. Select the exception.

! Puborectalis

Which muscle forms the traditional "six-pack" of a well-toned abdominal wall?

! Rectus abdominis

Which of the abdominal muscles is innervated by spinal nerves T7-T12?

! Rectus abdominis

Which is the longest muscle of the body?

! Sartorius

This figure shows a posterior view of the right thigh. What muscle does number 2 indicate?

! Semitendinosus

Which of the following is not one of the rotator cuff muscles?

! Teres major

This figure shows a lateral view of the right leg. What muscle is indicated by the number 1?

! Tibialis anterior

Which muscle is the primary dorsiflexor of the foot at the ankle?

! Tibialis anterior

This figure shows the muscles of the posterior trunk. What muscle does number 1 indicate?

! Trapezius

The principal elbow flexors located on the anterior side of the humerus are the: a: biceps brachii b: brachialis c: brachioradialis d: deltoid e: trapezius

! a, b, c

Muscles that protract the scapula would be ________ thoracic muscles.

! anterior posterior

For elbow flexion:

! biceps brachii is the agonist and triceps brachii is the antagonist.

The flexor digitorum longus is located in the:

! deep layer of the posterior compartment of the leg, and it flexes toes 2-5.

The muscles of the anterior compartment of the leg function to:

! dorsiflex the foot and extend the toes.

The __________ muscles of the foot both originate and insert within the foot.

! intrinsic

If the right sternocleidomastoid contracts unilaterally, the resulting movement will be:

! lateral flexion of the head to the right and rotation of the head to the left.

The ending "glossus" on the name of a muscle refers to:

! the tongue.