Chapter 2- Respiratory System-Muscles of Inspiration

Question 1

Muscles of Inspiration

Answer 1

1. Primary Muscle of Thorax
2. Accessory Muscles of Thorax,
3. Accessory Muscles of the Neck,
4. Muscles of the Upper Arm and Shoulder
5. Back Muscles of Inspiration
   pg 25

Question 2

Primary Muscles of Thorax

Answer 2

Diaphragm

pg 25

Question 3

Diaphragm

Answer 3

pulls central tendon down and back during inspiration (expands lungs in vertical dimension)
pg 25

Question 4

(Diaphragm, Structures):

Central Tendon

Answer 4

Intermediate region of the diaphragm.

When contracted the muscle fibers shorten.
pg 25

Question 5

(Diaphragm, Structures):

Aortic hiatus

Answer 5

Passage for abdominal aorta.

Supplies oxygenated blood to all of the abdominal and pelvic organs and the legs.
pg 25

Question 6

(Diaphragm, Structures):

Esophageal hiatus

Answer 6

Passage for esophagus and small arteries

pg 25

Question 7

(Diaphragm, Structures):

Foramen vena cava

Answer 7

Passage forinferior vena cava.

Large vein carrying deoxygenated blood back to the heart.
pg 25

Question 8

Accessory Muscles of Thorax

Anterior

Answer 8

1. External Intercostals
2. Internal Intercostals (interchondral portion)

elevate the rib cage
pg 26

Question 9

Accessory Muscles of Thorax

Posterior

Answer 9

1. Levators Costarum, raises ribs.
   
   • Brevis Portion, raises ribs.
   • Longus Portion, raises ribs
2. Serratus Posterior Superior

elevates ribs 2 - 5.
pg 26

Question 10

Accessory Muscles of the Neck

Sternocleidomastoid

Answer 10

elevates sternum and rib cage

pg 27

Question 11

Accessory Muscles of the Neck

Scalenus (anterior, middle, posterior)

Answer 11

elevates ribs 1-2

pg 27

Question 12

Muscles of the Upper Arm and Shoulder

Pectoralis major

Answer 12

elevates sternum and rib cage

pg 28

Question 13

Muscles of the Upper Arm and Shoulder

Pectoralis minor

Answer 13

with shoulder fixed, elevates ribs 2-5

pg 28

Question 14

Muscles of the Upper Arm and Shoulder

Serratus anterior

Answer 14

elevate ribs 1-9

pg 28

Question 15

Back Muscles of Inspiration)

Levator scapulae

Answer 15

elevates scapula and provides neck support

pg 29

Question 16

Back Muscles of Inspiration

Rhomboideus major

Answer 16

stabilize shoulder girdle

pg 29

Question 17

Back Muscles of Inspiration

Rhomboideus minor

Answer 17

stabilizes shoulder girdle

pg 29

Question 18

Back Muscles of Inspiration

Trapezius

Answer 18

elongation of the neck and head control

pg 29