During exhalation, what happens to the diaphragm and external intercostal muscles?
Question
During exhalation, what happens to the diaphragm and external intercostal muscles?
Solution
During exhalation, the diaphragm relaxes and moves upwards into the thoracic cavity. The external intercostal muscles also relax, causing the rib cage to move downwards and inwards. This reduces the volume of the thoracic cavity, increasing the pressure inside the lungs and forcing air out.
Similar Questions
What happens to your diaphragm when you breathe in?
Which muscle contracts during inhalation?External inter costal muscleRadial muscle of diaphragmBoth 1 and 2Internal inter costal muscle
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
When the diaphragm and external intercostal muscles relax:
Which of the following events does not occur during exhalation in human beings?The inter-costal muscles pull the ribs inwardlyThe volume of thoracic cavity increasesHigh pressure area is created inside the thoracic cavityDiaphragm becomes dome-shaped
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