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Read the following steps of inspiration ...

Read the following steps of inspiration
(A) Increases horacic volume
(B) Air move into lungs
(C) Contraction in diaphragm and EICM
(D) Increases pulmonary volume
(E) Lungs expand
(F) Decreases the intra pulmonary pressure.
Find out the correct sequence of these steps

A

A,B,C,D,E,F

B

C,D,A,E,F,B

C

C,A,D,E,F,B

D

C,E,D,A,F,B

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correct sequence of steps involved in the process of inspiration, we can analyze the steps provided and understand the physiological process of breathing. Here’s the step-by-step solution: ### Step-by-Step Solution: 1. **Contraction of Diaphragm and External Intercostal Muscles (C)**: - The process of inspiration begins with the contraction of the diaphragm and the external intercostal muscles. This contraction is crucial as it initiates the breathing process. 2. **Increase in Thoracic Volume (A)**: - As the diaphragm contracts, it moves downward, and the external intercostal muscles lift the rib cage. This results in an increase in the thoracic volume. 3. **Increase in Pulmonary Volume (D)**: - The increase in thoracic volume leads to an increase in pulmonary volume, as the lungs are attached to the thoracic cavity. This expansion allows more space for the air to fill. 4. **Lungs Expand (E)**: - As the pulmonary volume increases, the lungs themselves expand to fill this increased space, accommodating the air that will soon enter. 5. **Decrease in Intrapulmonary Pressure (F)**: - With the expansion of the lungs, the intrapulmonary pressure (the pressure inside the lungs) decreases. This decrease in pressure is essential for drawing air into the lungs. 6. **Air Moves into Lungs (B)**: - Finally, because the intrapulmonary pressure is now lower than the atmospheric pressure, air moves into the lungs, completing the process of inspiration. ### Correct Sequence: The correct sequence of steps for inspiration is: C → A → D → E → F → B
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