Which of the muscles below when stimulated will contract and push up on the diaphragm?
1) External intercostals
2) External obliques
3) Internal obliques
4) Rectus abdominous
A)1, 2, and 3 only
B)1 and 4 only
C)2, 3, and 4 only
D)1, 2, 3, and 4

Question

Quizplus · Accepted Answer

The external obliques, internal obliques, and rectus abdominis are all muscles of the abdominal wall that, when contracted, can compress the abdominal cavity and push up on the diaphragm, aiding in forced expiration. The external intercostals, in contrast, elevate the ribs during inspiration and do not push up on the diaphragm.

Which of the Muscles Below When Stimulated Will Contract and Push