Muscles of Respiration

Question 1

Serratus Posterior Superior

Answer 1

A: Elevates Ribs during forced inspiration
O: Cervical and Thoracic vertebrae
I: Ribs 2-5

Question 2

Serratus posterior inferior

Answer 2

A: Depresses ribs during forced expiration
O: Thoracic and lumbar vertebrae
I: Ribs 8-12

Question 3

Scalene Muscles

Answer 3

A: Elevate 1st and 2nd ribs during forced inspiration when neck is fixed
O: Cervical Vertebrae
I: Ribs 1 and 2

Question 4

External intercostals

Answer 4

A: Elevate ribs during quiet and forced inspiration
O: Superior rib
I: inferior rib

Question 5

Internal Intercostals

Answer 5

A:Depresses ribs during forced expiration
O: Inferior rib
I: Superior rib

Question 6

Transversus thoracis

Answer 6

A: Depresses ribs during forced expiration
O: Sternum
I: Ribs 2-6

Question 7

Diaphragm

Answer 7

A: Contraction causes flattening of diaphragm (moves inferiorly) during inspiration and expands the thoracic cavity; increases pressure of abdominopelvic cavity
O: ribs 7-12, sternum, lumbar vertebra
I: Central Tendon