NEET BIOLOGY

Detailed explanation-1: -Rhythmic nerve impulses generated from the the inspiratory center of the medulla oblongata in the brain pass through the nerve and stimulate the diaphragm and intercostal thereby regulating the respiration. Thus, the correct option is D.

Detailed explanation-2: -The ventilation centres in the medulla oblongata respond by increasing the frequency of nerve impulses sent to the diaphragm and intercostal muscles. The diaphragm and intercostal muscles contract and relax faster, increasing the rate of breathing.

Detailed explanation-3: -The respiratory center is located in the medulla oblongata and is involved in the minute-to-minute control of breathing.

Detailed explanation-4: -The medulla oblongata is the primary respiratory control center. Its main function is to send signals to the muscles that control respiration to cause breathing to occur. There are two regions in the medulla that control respiration: The ventral respiratory group stimulates expiratory movements.

Detailed explanation-5: -These respiratory centers (inspiration and expiration centers) are sometimes called the “medullary rhythmicity” centers, as they are believed to set the baseline rhythm for respiration. In the normal resting state, respiration is due to the inspiratory center and when these nerves shut off, there is passive exhalation.