Question

When the ______4. _______ muscles relax and the _______5. ______ relaxes and moves back to its dome-like position

Answer 1

4. External intercostal, 5. Diaphragm.

Step-by-step explanation:

Context is needed for a more accurate answer, but based off of the parameters of the provided question, I tried my best to infer the muscles based on the shape (dome-like).

This answer might be correct, as the diaphragm it is said to be "a large, dome-shaped muscle that contracts rhythmically and continually..."