Deck 13: Gross Anatomy of Muscular System

Question 1

A prime mover (agonist) .

A) aids the action of the muscle primarily responsible for the movement
B) immobilizes the origin of the prime mover
C) is primarily responsible for a movement
D) opposes or reverses a movement

Answer 1

C

Question 2

This muscle originates on the zygomatic arch and inserts at the angle and ramus of the mandible. It is responsible for closing the jaw.

A) zygomaticus
B) risorius
C) masseter
D) temporalis

Answer 2

C

Question 3

An agonist for elbow flexion is , whereas the _ is an antagonist to this movement.

A) brachioradialis, deltoid
B) deltoid, biceps brachii
C) biceps brachii, triceps brachii
D) triceps brachii, brachialis

Answer 3

C

Question 4

Muscles are named based on all the criteria below except .

A) action of the muscle
B) number of origins
C) color of the muscle
D) direction of muscle fibers

Question 5

This muscle is named for the direction of its fibers.

A) sartorius
B) external oblique
C) gluteus maximus
D) tibialis anterior

Question 6

Commonly referred to as the , this muscle group on the posterior thigh extends the hip.

A) hamstrings
B) tensor fasciae latae
C) gluteus medius
D) quadriceps femoris

Question 7

This muscle allows you to stand on tiptoe when the knee is extended, and it flexes the knee when the foot is dorsiflexed.

A) soleus
B) fibularis longus and brevis acting together
C) gastrocnemius
D) fibularis longus

Question 8

This powerful muscle is the prime mover of arm extension.

A) supraspinatus
B) latissimus dorsi
C) teres minor
D) rhomboids

Question 9

A superficial muscle of the leg, this one dorsiflexes the foot.

A) soleus
B) tibialis anterior
C) gastrocnemius
D) fibularis longus

Question 10

This muscle compresses the cheek when you whistle.

A) levator labii superioris
B) depressor labii inferioris
C) buccinator
D) masseter

Question 11

This large, fan-shaped muscle of the upper chest is the prime mover of arm flexion.

A) serratus anterior
B) pectoralis major
C) deltoid
D) external oblique

Question 12

This muscle is used in smiling.

A) zygomaticus
B) orbicularis oris
C) levator labii superioris
D) depressor anguli oris

Question 13

The primary action of muscle on the medial compartment of the thigh is .

A) extension of the thigh
B) adduction of the thigh
C) abduction of the thigh
D) flexion of the thigh

Question 14

The shape of this muscle gives it its name.

A) brachialis
B) vastus lateralis
C) scalenes
D) trapezius

Question 15

This forearm muscle is a powerful wrist flexor.

A) extensor digitorum
B) palmaris longus
C) flexor carpi radialis
D) pronator teres

Question 16

This muscle closes the eyes, allowing you to wink or blink.

A) orbicularis oculi
B) frontal belly of the epicranius
C) corrugator supercilii
D) orbicularis oris

Question 17

When both muscles of this pair are contracted simultaneously, they flex the neck forward.

A) trapezius
B) sternocleidomastoid
C) platysma
D) semispinalis

Question 18

This deep muscle flexes the trunk on the thigh.

A) splenius group
B) erector spinae
C) iliopsoas
D) adductor longus

Question 19

A muscle located on the anterior surface of the thigh will the knee, whereas a muscle on the posterior surface will the knee.

A) abduct, adduct
B) extend, flex
C) flex, extend
D) adduct, abduct

Question 20

This name reveals the number of the muscle's origins.

A) triceps brachii
B) temporalis
C) pectoralis major
D) adductor longus

Question 21

Which of the following muscle does not form part of the rotator cuff?

A) infraspinatus
B) teres major
C) supraspinatus
D) teres minor

Question 22

This pair of muscles includes the prime mover of inspiration, and its synergist.

A) external intercostals and internal intercostals
B) diaphragm and external intercostals
C) sternocleidomastoid and external intercostals
D) pectoralis minor and internal intercostals

Question 23

Brachioradialis and sternocleidomastoid are named for _.

A) the location of their origin and insertion
B) their shape
C) their relative size
D) the direction of their muscle fibers

Question 24

This muscle originates on the spinous processes of C7 and T1 - T5, and inserts on the medial border of the scapula.

A) infraspinatus
B) teres minor
C) rhomboids
D) levator scapulae

Question 25

Like the deltoid muscle that lies over and abducts the shoulder, these two muscles lie over the hip and are prime movers of hip abduction. Neither muscle extends the hip.

A) gluteus minimus and gluteus maximus
B) gluteus maximus and gluteus medius
C) gluteus medius and gluteus minimus

Question 26

A synergist to zygomaticus, this muscle aids in smiling.

A) orbicularis oris
B) levator labii superioris
C) depressor anguli oris
D) risorius

Question 27

Commonly called as the "tailors muscle," this muscle allows one to sit in a cross-legged position.

A) sartorius
B) gastrocnemius
C) hamstrings
D) quadriceps

Question 28

This muscle works as a fixator of the shoulder when you attempt to lift a heavy table with your forearm.

A) serratus anterior
B) platysma
C) deltoid
D) external oblique

Question 29

Pectoralis major originates on the and inserts in the intertubercular sulcus of the humerus.

A) the clavicle, acromion, and spine of the scapula
B) anterior surface of the scapula
C) lateral aspect of ribs 2 through 5
D) clavicle and sternum

Question 30

The quadriceps are the prime movers of knee extension. Which muscle group is an antagonist to knee extension?

A) tibialis anterior
B) hamstrings
C) soleus
D) gluteus maximus

Question 31

This superficial muscle covers a large part of the posterior thorax.

A) trapezius
B) rhomboids
C) pectoralis major
D) rectus abdominis