muscles in inspiration and expiration

Question 1

inspiration (at rest)

Answer 1

external intercostals and diaphragm

Question 2

expiration (at rest)

Answer 2

passive - external intercostals and diaphragm relax

Question 3

inspiration (during exercise)

Answer 3

external intercostals, diaphragm, sternocleidomastoid, scalenes, pectorals minor

Question 4

expiration (during exercise)

Answer 4

internal intercostals, abdominals