exam 3 respiratory muscles

Question 1

which nerves innervate the external intercostal muscles?

Answer 1

motor, T1-T11

Question 2

which nerves innervate the diaphragm

Answer 2

motor: phrenic, cervical nerve 3, 4, 5

Question 3

the lungs are housed within the

Answer 3

thorax

Question 4

the pelvic girdle is compromised of

Answer 4

ilium
pubic bone
ischium

Question 5

the point of attachment for the first rib

Answer 5

manubrium of sternum

Question 6

the ——- nerve innervates the diaphragm

Answer 6

phrenic

Question 7

muscles of expiration

Answer 7

transverse abdominus
external oblique
internal intercostals

Question 8

muscles of inspiration

Answer 8

external intercostals
diaphragm

Question 9

vital capacity consists of

Answer 9

IRV (inspiratory reserve volume)
ERV (expiratory reserve volume)
TV (tidal volume)

Question 10

rectus abdominus

Answer 10

muscles that runs from the xiphoid process to the pubic symphysis

Question 11

xiphoid process

Answer 11

forms the anterior-most attachment of the diaphragm

Question 12

diaphragm

Answer 12

main muscle of inspiration

Question 13

manubrium

Answer 13

the superior-most structure of the sternum

Question 14

coccygeal vertebrae

Answer 14

4

Question 15

cervical vertebrae

Answer 15

7

Question 16

lumbar vertebrae

Answer 16

5

Question 17

thoracic vertebrae

Answer 17

12

Question 18

What is the attachment point of the diaphragm?

Answer 18

central tendon, xiphoid process of sternum, ribs (7-12) and their costal cartilages, lumbar vertebrae (1-3)

The diaphragm is a crucial muscle for breathing, separating the thoracic cavity from the abdominal cavity.

Question 19

What is the main function of the diaphragm?

Answer 19

main muscle of inspiration

The diaphragm contracts to allow the lungs to expand during inhalation.

Question 20

Which nerve innervates the diaphragm?

Answer 20

motor: phrenic nerve. composed of fibers from C3, C4, C5

The phrenic nerve plays a vital role in the respiratory process.

Question 21

What is the function of the internal intercostals?

Answer 21

expiration

These muscles help to depress the ribs during exhalation.

Question 22

What is the innervation of the internal intercostals?

Answer 22

motor: intercostal nerves (T1-T11)

Each intercostal muscle is innervated by the spinal nerves corresponding to its vertebral level.

Question 23

What is the primary function of the external intercostals?

Answer 23

inspiration

The external intercostals elevate the ribs, aiding in inhalation.

Question 24

What is the innervation of the external intercostals?

Answer 24

motor: intercostal nerves (T1-T11)

Similar to internal intercostals, these muscles are also innervated by intercostal nerves.

Question 25

What are the attachment points of the rectus abdominus?

Answer 25

pubic symphysis and pubis bone, xyphoid process, costal cartilages of ribs 5-7 ## Footnote This muscle is important for trunk flexion and stabilization.

Question 26

What is the function of the rectus abdominus?

Answer 26

expiration ## Footnote The rectus abdominus aids in forced exhalation.

Question 27

What nerves innervate the rectus abdominus?

Answer 27

thoracoabdominal nerves (T7-T11) ## Footnote These nerves are responsible for the motor function of the rectus abdominus.

Question 28

What are the attachment points of the external oblique?

Answer 28

xyphoid process, external surfaces of ribs 5-12, linea alba, anterior portion of iliac crest ## Footnote The external oblique assists with trunk rotation and lateral flexion.

Question 29

What is the function of the external oblique?

Answer 29

expiration ## Footnote It plays a role in the process of exhaling.

Question 30

What nerves innervate the external oblique?

Answer 30

thoracoabdominal nerves (T7-T11), subcostal nerve (T12) ## Footnote These nerves provide motor control for the external oblique muscle.

Question 31

What are the attachment points of the internal oblique?

Answer 31

xyphoid process, inferior borders of ribs 10-12, anterior portion of iliac crest, thoracolumbar fascia, linea alba, pubic symphysis ## Footnote The internal oblique is involved in trunk rotation and flexion.

Question 32

What is the function of the internal oblique?

Answer 32

expiration ## Footnote It aids in expelling air during forced exhalation.

Question 33

What nerves innervate the internal oblique?

Answer 33

thoracoabdominal nerves (T7-T11), iliohypogastric (L1) ## Footnote These nerves provide the necessary motor function for the internal oblique.

Question 34

What are the attachment points of the transverse abdominus?

Answer 34

xyphoid process, internal surfaces of ribs 7-12 (costal cartilages), thoracolumbar fascia, iliac crest, linea alba, pubic crest, pubic symphysis ## Footnote The transverse abdominus is crucial for core stability.

Question 35

What is the function of the transverse abdominus?

Answer 35

expiration ## Footnote This muscle helps in the process of forced exhalation.

Question 36

What nerves innervate the transverse abdominus?

Answer 36

thoracoabdominal nerves (T7-T11), iliohypogastric (L1) ## Footnote These nerves are essential for its motor function.