HUMAN PHYSIOLOGY
BREATHING AND RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Through intercostal nerves to intercostal muscles
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Through phrenic nerve to the diaphragm
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Through axillary nerve to supra costal muscles
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Through intercostal nerves to intercostal muscles and phrenic nerve to the diaphragm
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Detailed explanation-1: -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-2: -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-3: -Your phrenic nerve plays a critical role in your respiratory system to aid breathing. It’s the only nerve in your nervous system that provides motor (movement) function to your diaphragm. It sends signals that cause your diaphragm to expand and contract. These movements allow your lungs to inhale and exhale air.
Detailed explanation-4: -The medullary inspiratory center, located in the medulla oblongata, generates rhythmic nerve impulses that stimulate contraction of the inspiratory muscles (diaphragm and external intercostal muscles).