EMBRYOLOGY
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following does NOT happen during expiration?
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The diaphragm rises
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Inspiratory muscles contract
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Volume in the thoracic cavity decreases
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Air moves out of our lungs
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Explanation:
Detailed explanation-1: -So, the correct option is ‘Ribs are pushed upward and outward’. Was this answer helpful?
Detailed explanation-2: -The pectoralis major (answer C) muscle is not used for inspiration. The main muscles used for inspiration are the diaphragm, which pushes down, and the external intercostal muscles, which push out during inspiration. The sternocleidomastoid and scalene muscles play a minor role in inspiration activities.
Detailed explanation-3: -The diaphragm, sternocleidomastoid, and scalenes aid in inspiration when they contract. The external intercostals are involved in normal expiration, not forced.
There is 1 question to complete.