Question

Arrange the following in the correct sequence from 1st to last, the steps involved in inspiration:

1) Diaphragm and intercostal muscles contract
2) Thoracic cavity and lungs increase in size
3) Alveolar pressure drops to 758 mm Hg.

a. 1, 2, 3
b. 3, 2, 1
c. 2, 3, 1
d. 1, 3, 2
e. 2, 1, 3

Answer 1

The correct sequence of steps involved in inspiration is diaphragm and intercostal muscles contract, thoracic cavity and lungs increase in size, and alveolar pressure drops to 758 mm Hg. The answer is option a. 1, 2, 3.

Step-by-step explanation:

The correct sequence of steps involved in inspiration is:

1. Diaphragm and intercostal muscles contract
2. Thoracic cavity and lungs increase in size
3. Alveolar pressure drops to 758 mm Hg

Therefore, the answer is option a. 1, 2, 3.