How does the nervous system influence the respiratory system
A) it controls muscle contraction
B) it regulates urine output
C)it regulates blood pressure
D) it stimulates defense against pathogens
A) it controls muscle contraction
The correct answer is A) it controls muscle contraction.
The nervous system plays a crucial role in regulating various bodily functions, including the respiratory system. It influences the respiratory system mainly by controlling the contraction of muscles involved in breathing.
The respiratory muscles, such as the diaphragm and intercostal muscles, are responsible for the inhalation and exhalation of air. These muscles are under the control of the somatic division of the peripheral nervous system. The somatic nervous system receives signals from the brain and spinal cord, which then stimulate the respiratory muscles to contract and relax accordingly.
During inhalation, the somatic nervous system promotes the contraction of the diaphragm and intercostal muscles, causing them to move and expand the chest cavity. This expansion creates a negative pressure inside the lungs, allowing air to be drawn in. Conversely, during exhalation, the somatic nervous system promotes the relaxation of these muscles, resulting in the compression of the chest cavity and the expulsion of air.
Therefore, the nervous system influences the respiratory system by controlling the contraction and relaxation of the respiratory muscles, ensuring the proper movement of air in and out of the lungs.
The correct answer is A) it controls muscle contraction. The nervous system plays a crucial role in regulating and controlling various bodily functions, including respiration. The nervous system influences the respiratory system through its control over the muscles involved in breathing.
To understand how the nervous system influences the respiratory system, you can start by learning about the different components involved in respiration. Respiration primarily involves the movement of the diaphragm and intercostal muscles, which help expand and contract the lungs.
The nervous system, specifically the autonomic nervous system, controls the involuntary movements of these muscles. It sends signals to the diaphragm and intercostal muscles, instructing them to contract or relax to facilitate breathing. During inhalation, the nervous system stimulates the contraction of these muscles, causing them to expand the chest cavity and draw air into the lungs. On the other hand, during exhalation, the nervous system promotes relaxation of these muscles, allowing the chest cavity to decrease in size and push air out of the lungs.
Therefore, the nervous system's control over muscle contraction is what enables the respiratory system to function properly and regulate the exchange of oxygen and carbon dioxide in the body.