NEET Zoology Respiratory Organs MCQ Question
A diagram shows the structure of the human thoracic cavity with arrows indicating the movement of the diaphragm and ribs during breathing. What does this movement result in?
Increase in thoracic volume and decrease in pressure, leading to inspiration.
Decrease in thoracic volume and increase in pressure, leading to inspiration.
Increase in thoracic volume and increase in pressure, leading to expiration.
Decrease in thoracic volume and decrease in pressure, leading to expiration.
Correct Answer
Detailed Explanation
During inspiration, the diaphragm and intercostal muscles contract, increasing thoracic volume and decreasing pressure, allowing air to flow into the lungs.
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