muscles of respiration

Question 1

origin of diaphragm (4)

Answer 1

xiphoid process, costal cartilage, lumbar vertebrae, inferior internal surface of lower ribs

Question 2

insertion of diaphragm

Answer 2

central tendon

Question 3

action of diaphragm

Answer 3

pulls central tendon down which increases the vertical dimension of the thorax (air into the lungs)

Question 4

origin of external intercostals

Answer 4

inferior border of rib above

Question 5

insertion of external intercostals

Answer 5

superior border of rib below

Question 6

action of external intercostals

Answer 6

elevates ribs by causing movement up and out (inhalation)

Question 7

what are the external intercostals for

Answer 7

restful breathing

Question 8

what are the internal intercostals for

Answer 8

forceful and intense breathiing

Question 9

origin of internal intercostals

Answer 9

superior border of rib below

Question 10

insertion of internal intercostals

Answer 10

inferior border of rib above

Question 11

action of internal intercostals

Answer 11

depresses ribs during forced exhalation