Question:
The respiratory centre that regulates breathing rhythm is located in:
The respiratory centre that regulates breathing rhythm is located in:
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Remember:
Primary rhythm center = Medulla oblongata.
Modulating/Pneumotaxic center = Pons.
This distinction is a common point of testing in neural control of respiration.
Primary rhythm center = Medulla oblongata.
Modulating/Pneumotaxic center = Pons.
This distinction is a common point of testing in neural control of respiration.
Updated On: Jul 22, 2026
- Cerebrum
- Medulla oblongata
- Hypothalamus
- Pons
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
This question asks for the primary region of the brain responsible for maintaining and regulating the basic involuntary rhythm of breathing.
Step 2: Key Concept and Approach:
The regulation of respiration is controlled by nervous centers located in the brainstem.
These include the medulla oblongata and the pons.
We need to identify which specific region holds the primary regulatory center for the breathing rhythm.
Step 3: Detailed Explanation:
• Medulla oblongata: This region contains the primary respiratory rhythm center.
It consists of dorsal and ventral groups of neurons that generate the basic rhythm of breathing.
It is highly sensitive to carbon dioxide ($CO_2$) and hydrogen ion ($H^+$) concentrations in the blood.
Hence, Option (B) is correct.
• Pons: The pons contains the pneumotaxic center.
It can moderate the functions of the respiratory rhythm center but is not the primary generator of the basic rhythm.
It acts as an "off-switch" to limit inspiration.
• Cerebrum: It is responsible for voluntary respiratory control, not the basic automated rhythm.
• Hypothalamus: It regulates body temperature, emotions, and autonomic functions, but does not house the primary breathing rhythm center.
Step 4: Final Answer:
The respiratory rhythm center is located in the medulla oblongata.
This question asks for the primary region of the brain responsible for maintaining and regulating the basic involuntary rhythm of breathing.
Step 2: Key Concept and Approach:
The regulation of respiration is controlled by nervous centers located in the brainstem.
These include the medulla oblongata and the pons.
We need to identify which specific region holds the primary regulatory center for the breathing rhythm.
Step 3: Detailed Explanation:
• Medulla oblongata: This region contains the primary respiratory rhythm center.
It consists of dorsal and ventral groups of neurons that generate the basic rhythm of breathing.
It is highly sensitive to carbon dioxide ($CO_2$) and hydrogen ion ($H^+$) concentrations in the blood.
Hence, Option (B) is correct.
• Pons: The pons contains the pneumotaxic center.
It can moderate the functions of the respiratory rhythm center but is not the primary generator of the basic rhythm.
It acts as an "off-switch" to limit inspiration.
• Cerebrum: It is responsible for voluntary respiratory control, not the basic automated rhythm.
• Hypothalamus: It regulates body temperature, emotions, and autonomic functions, but does not house the primary breathing rhythm center.
Step 4: Final Answer:
The respiratory rhythm center is located in the medulla oblongata.
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