Abdominals and Respiratory Muscles: Action

Question 1

Determine the action of the serratus posterior superior
A. Raises ribs and therefore inspiratory muscle
B. Proprioception; possible raises ribs and therefore inspiratory muscle
C. Increases vertical diameter of the thorax by pulling central tendon downward; assists in raising lower ribs
D. Proprioception, possibly depresses ribs and therefore and expiratory muscle

Answer 1

B. Proprioception; possible raises ribs and therefore inspiratory muscle

Question 2

Determine the action of the serratus posterior inferior
A. Raises ribs and therefore inspiratory muscle
B. Proprioception; possible raises ribs and therefore inspiratory muscle
C. Increases vertical diameter of the thorax by pulling central tendon downward; assists in raising lower ribs
D. Proprioception, possibly depresses ribs and therefore an expiratory muscle

Answer 2

D. Proprioception, possibly depresses ribs and therefore an expiratory muscle

Question 3

Determine the action of the diaphragm
A. Raises ribs and therefore inspiratory muscle
B. Proprioception; possible raises ribs and therefore inspiratory muscle
C. Increases vertical diameter of the thorax by pulling central tendon downward; assists in raising lower ribs
D. Proprioception, possibly depresses ribs and therefore and expiratory muscle

Answer 3

C. Increases vertical diameter of the thorax by pulling central tendon downward; assists in raising lower ribs

Question 4

Determine the action of the levatores costarum (12)
A. Raises ribs and therefore inspiratory muscle
B. Proprioception; possible raises ribs and therefore inspiratory muscle
C. Increases vertical diameter of the thorax by pulling central tendon downward; assists in raising lower ribs
D. Proprioception, possibly depresses ribs and therefore and expiratory muscle

Answer 4

A. Raises ribs and therefore inspiratory muscle

Question 5

Determine the muscle described by its action:
The most important muscle of inspiration that acts as a thoracoabdominal pump. It increases intra-abdominal pressure as in abdominal straining and weight lifting, and helps in child-birth, urinating, and defecating.

Answer 5

Diaphragm

Question 6

The action of this muscle:
Stabilizes rib cage; with the lower ribs fixed by abdominal muscle, it lowers ribs during expiration
A. Transversus thoracis
B. Subcostales
C. Innermost intercostal
D. Internal intercostal (11)
E. External intercostal (11)

Answer 6

D. Internal intercostal (11)

Question 7

The action of this muscle:
Assists the internal and external intercostal muscles
A. Transversus thoracis
B. Subcostales
C. Innermost intercostal
D. Internal intercostal (11)
E. External intercostal (11)

Answer 7

C. Innermost intercostal

Question 8

The action of this muscle:
May depress ribs, expiratory in function
A. Transversus thoracis
B. Subcostales
C. Innermost intercostal
D. Internal intercostal (11)
E. External intercostal (11)

Answer 8

B. Subcostales

Question 9

The action of this muscle:
Expiratory muscle; depresses costal cartilages; lie deep to internal thoracic vessels and secure these vessels to the wall
A. Transversus thoracis
B. Subcostales
C. Innermost intercostal
D. Internal intercostal (11)
E. External intercostal (11)

Answer 9

A. Transversus thoracis

Question 10

The action of this muscle:
Stabilizes the rib cage; active during inspiration; supports intercostal space
A. Transversus thoracis
B. Subcostales
C. Innermost intercostal
D. Internal intercostal (11)
E. External intercostal (11)

Answer 10

E. External intercostal (11)

Question 11

The action of this muscle:
When the 1st rib is fixed, it moves ribs superiorly and increase AP and transverse diameters
A. Transversus thoracis
B. Subcostales
C. Innermost intercostal
D. Internal intercostal (11)
E. External intercostal (11)

Answer 11

E. External intercostal (11)

Question 12

Most active respiratory muscle during expiration
A. Transversus thoracis
B. Subcostales
C. Innermost intercostal
D. Internal intercostal (11)
E. External intercostal (11)

Answer 12

D. Internal intercostal (11)

Question 13

TRUE OR FALSE: The oblique muscles laterally flex and rotate the trunk.

Answer 13

True

Question 14

It compresses abdominal contents, flexes the vertebral column and stabilizes pelvis; an accessory muscle of expiration

A. External oblique
B. Internal oblique
C. Transversus abdominis
D. Rectus abdominis
E. Both A and B

Answer 14

D. Rectus abdominis

Question 15

Action: Compresses abdominal contents

A. External oblique
B. Internal oblique
C. Transversus abdominis
D. Rectus abdominis
E. Both A and B

Answer 15

C. Transversus abdominis

Question 16

Actions: Supports abdominal contents; compresses abdominal contents; assists in flexing and rotating trunk, forced respiration, micturition, defecation, parturition, and vomiting

A. External oblique
B. Internal oblique
C. Transversus abdominis
D. Rectus abdominis
E. Both A and B

Answer 16

E. Both A and B

Question 17

Action: It flexes the 12th rib during inspiration; depresses the 12th rib during forced expiration; laterally flexes the vertebral column on the same side

A. Psoas
B. Iliacus
C. Quadratus lumborum
D. Pyramidalis
E. Both A and B

Answer 17

C. Quadratus lumborum

Question 18

Action: It flexes the thigh; if the thigh is fixed, it flexes the trunk on the thigh as in sitting up from lying down

A. Psoas
B. Iliacus
C. Quadratus lumborum
D. Pyramidalis
E. Both A and B

Answer 18

E. Both A and B

Question 19

Action: Tenses the linea alba
A. Psoas
B. Iliacus
C. Quadratus lumborum
D. Pyramidalis
E. Both A and B

Answer 19

D. Pyramidalis

Question 20

TRUE OR FALSE: During inspiration, the 1st rib is fixed by the scalene muscle and the intercostal muscles raise the 2nd to 12th rib towards the first rib.

Answer 20

True

Question 21

TRUE OR FALSE: During expiration, the 12th rib is fixed by the quadratus lumborum and the oblique muscles of the abdomen, and the 1st to 11th ribs will be lowered by the contraction of the intercostal muscles.

Answer 21

True