100. What is incorrect w.rit. forceful expiration?
(1) Contraction of abdominal muscles
(2) Contraction of internal intercostal muscle
(3) Contraction of external intercostal muscles
(4) Relaxation of diaphragm
O2
O4
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Answered by
1
Answer:
I think option B because they expand when we expire and they contract emwhen we inhale
Explanation:
hope my answer is correct and helpful for you
Answered by
1
Answer:
2) Contraction of external Intercoastal muscles
This is the correct answer
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