NEET Zoology Mechanism of Breathing Match the Following Question
Match Column-I with Column-II.
| Column-I | Column-II |
|---|---|
| (a) Inspiration | (i) Diaphragm contraction |
| (b) Expiration | (ii) Decrease in thoracic volume |
| (c) Pulmonary volume | (iii) Increase in intra-pulmonary pressure |
| (d) Inter-costal muscles | (iv) Air movement into the lungs |
a-i, b-ii, c-iv, d-iii
a-iv, b-iii, c-i, d-ii
a-ii, b-i, c-iii, d-iv
a-iii, b-iv, c-ii, d-i
Correct Answer
Detailed Explanation
Inspiration involves the contraction of the diaphragm (a-i) which increases the volume of the thoracic cavity, leading to air moving into the lungs (d-iv). Expiration results from a decrease in thoracic volume (b-ii) and causes an increase in intra-pulmonary pressure (c-iii), pushing air out.
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