Q. During inspiration (J.I.PME.R.2004,Orissa 2005,R.PMT.2005) (Solved)
1. Diaphragm and external muscles relax
2. Diaphragm and internal intercostal muscles relax
3. Diaphragm and external intercostal muscles contract
4. Diaphragm and internal intercostal muscles contract.
- c. Diaphragm and external intercostal muscles contract