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Question

During inhalation, the diaphragm:


A

Moves downwards

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B

Moves upwards

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C

Moves towards left

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D

Moves towards right

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Solution

The correct option is A

Moves downwards


The correct option is A.
Explanation of the correct option:

  1. The process, by which air is drawn in from the atmosphere into the lungs and forced out from the lungs back into the atmosphere is known as breathing.
  2. It involves two steps-inhalation and exhalation.
  3. Inhalation or inspiration involves the taking of atmospheric air into the lungs.
  4. It is possible by the contraction and expansion of the thoracic cavity.
  5. The intercostal muscles and the diaphragm also play a significant role in the process of inhalation.
  6. The diaphragm is a muscular sheet that separates the thoracic and abdominal cavity.
  7. The muscles of the diaphragm contract and moves downward to increase the volume of the thoracic cavity.

Final answer:
During inhalation, the diaphragm moves downwards.


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