Which of following movements occur during exhalation?
Answer Details
During exhalation, the diaphragm and intercostal muscles relax. As a result, the thoracic cavity decreases in volume, causing a decrease in lung volume and an increase in pressure within the lungs. This increased pressure forces air out of the lungs, allowing for exhalation. Therefore, the correct option is "The diaphragm and intercostal muscles relax."