Unit 4: Notes 6

Question 1

what are the two most important breathing muscles

Answer 1

intercostal muscles and diaphragm

Question 2

what are intercostal muscles

Answer 2

• between ribs

- raises/lower rib Cage for breathing

Question 3

diaphragm

Answer 3

changes size of the thoracic cavity to aid in inhalation/exhalation

Question 4

what moves the shoulder girdle and stabilizes the scapula

Answer 4

1. Serratus anterior
2. Pectoralis minor
3. trapezius
4. rhomboid major
5. rhomboid minor

Question 5

serratus anterior

Answer 5

• originates along anterior surface of ribs and insert into the scapula
• aids horizontal arm movement: punching and pushing

Question 6

Pectoralis minor

Answer 6

rotates the scapula downward

Question 7

trapezius

Answer 7

elevates the scapula, extends the head

Question 8

rhomboid major

Answer 8

dorsal muscle inferior to rhomboid minor

Question 9

rhomboid minor

Answer 9

dorsal muscle superior to rhomboid major

Question 10

what are the muscles of the abdominal wall

Answer 10

1. transverse abdominus
2. rectus abdominus
3. internal oblique
4. external oblique

Question 11

transverse abdominus

Answer 11

fibers run perpendicular

Question 12

rectus abdominus

Answer 12

strap like muscles, fibers run parallel, a.k.a. “six pack”

Question 13

internal oblique

external oblique

Answer 13

lateral wall of abdomen, runs diagonal

Question 14

what are the muscles that move the humerus

Answer 14

1. Pectoralis major
2. latissimus dorsi
3. deltoid
4. Infraspinatus
5. Supraspinatus
6. Teres major
7. teres minor