Q5. Which of the following statements about lung function describes the process of 'expiration'1 pointThe diaphragm and external intercostal muscles contract, drawing air into the lungs.The diaphragm and external intercostal muscles contract, forcing air out of the lungs.The diaphragm and external intercostal muscles relax, drawing air into the lungs.The diaphragm and external intercostal muscles relax, forcing air out of the lungs.
Question
Q5. Which of the following statements about lung function describes the process of 'expiration'1 pointThe diaphragm and external intercostal muscles contract, drawing air into the lungs.The diaphragm and external intercostal muscles contract, forcing air out of the lungs.The diaphragm and external intercostal muscles relax, drawing air into the lungs.The diaphragm and external intercostal muscles relax, forcing air out of the lungs.
Solution
The correct statement that describes the process of 'expiration' is: "The diaphragm and external intercostal muscles relax, forcing air out of the lungs."
Here's the step-by-step process of expiration:
- The diaphragm and external intercostal muscles relax. The diaphragm moves upward and the rib cage moves downward.
- This decreases the volume of the thoracic cavity, which increases the pressure inside the cavity.
- The increase in pressure forces air out of the lungs, through the trachea, and out of the body. This is the process of expiration, or exhaling.
Similar Questions
Select all of the following that describes expiration.Multiple select question.Pressure in the lungs decreases.Rib cage moves down and in.Diaphragm relaxes and moves up.Internal intercostal muscles pull the ribs inward.
Arrange the following steps of expiration in correct sequence and select the correct option thereafter.(A) Increase in intra-pulmonary pressure to slightly above the atmospheric pressure.(B) Returning of diaphragm and sternum to their normal positions.(C) Expulsion of air from the lungs. (D) Relaxation of the diaphragm and the inter-costal muscles.(E) Reduction in thoracic volume and thereby the pulmonary volume.Options :D,E,B,A,CA,D,B,E,CD,B,E,A,CE,B,A,D,C
When the diaphragm and external intercostal muscles contract: choose one• none of these conditions would occur• intrapleural pressure decreases• intrapulmonary pressure increasesO expiration occurs• volume of the lungs decreases
Determine what happens when the diaphragm contracts. Hint: Select three options.The lungs shrinkThe lungs expandAir pressure in the lungs increasesAir pressure in the lungs decreasesAir is drawn into the lungs (inhalation)Air is forced out of the lungs (exhalation)
The volume of air remaining in the respiratory passages and lungs after forceful expiration is called:
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