Lab #6 Muscle Functions

Question 1

Protraction and superior rotation of scapula

Holds scapula against thoracic wall

Answer 1

Serratus Anterior

Question 2

Flexes vertebral column

Answer 2

Rectus Abdominus

Question 3

Flexes neck

Rotates head

Answer 3

Sternocleidomastoid

Question 4

Raises eyebrows

Creates wrinkles on forehead

Answer 4

Epicranius, frontal belly

Question 5

Synergist of Masseter in closing the jaw

Answer 5

Temporalis

Question 6

Extends the neck

Adducts scapula

Answer 6

Trapezius

Question 7

Allows blinking, squinting, closing eyes, and winking

Answer 7

Orbicularis Oculi

Question 8

Compresses (holds stuff in) abdominal contents

Answer 8

Transversus Abdominus

Question 9

Closes mouth

Protrudes Lips

Answer 9

Orbicularis Oris

Question 10

Pulls corners of lips upwards (smiles)

Answer 10

Zygomaticus

Question 11

Flexes vertebral column

Rotates trunk

Bends trunk laterally

Answer 11

Oblique, external/internal

Question 12

Helps to raise rib cage when inhaling

Answer 12

Intercostals, external

Question 13

Closes jaw by raising mandible

Answer 13

Masseter

Question 14

Draws down the scapula

Raises the ribs

Answer 14

Pectoralis minor

Question 15

Adducts and flexes humerus

Answer 15

Pectoralis major

Question 16

Decompresses rib cage during forcible exhalation

Answer 16

Intercostals, internal

Question 17

Pulls scalp posteriorly

Answer 17

Epicranius, occipital belly

Question 18

Separates thorax from abdominopelvic cavity

Assists in breathing (contraction increases volume of thorax and inflates the lungs)

Answer 18

Diaphragm