Respiratory Control Centers — NEET Biology
📚 Practice ConceptRespiratory rhythm is maintained by the respiratory centre in the medulla region of brain. A pneumotaxic centre in the pons region of the brain and a chemosensitive area in the medulla can alter respiratory mechanism.
Match the following respiratory regulatory components with their location and primary function: COLUMN I (Component) A. Respiratory rhythm centre B. Pneumotaxic centre C. Chemosensitive area D. Peripheral chemoreceptors COLUMN II (Location) i. Pons region of brain ii. Medulla region of brain iii. Adjacent to the rhythm centre iv. Associated with aortic arch and carotid artery COLUMN III (Primary Function) x. Primarily responsible for basic respiratory rhythm y. Reduces the duration of inspiration z. Highly sensitive to CO₂ and H⁺, sending signals to rhythm centre w. Recognise changes in CO₂ and H⁺ concentrations in arterial blood
View solution & NCERT explanation
Correct answer: D — A-ii-x, B-i-y, C-iii-z, D-iv-w
Let's match each component with its correct location and primary function: A. Respiratory rhythm centre: Located in the medulla region of the brain (ii) and primarily responsible for the basic respiratory rhythm (x). So, A-ii-x. B. Pneumotaxic centre: Located in the pons region of the brain (i) and moderates the functions of the rhythm centre by reducing the duration of inspiration (y). So, B-i-y. C. Chemosensitive area: Located adjacent to the rhythm centre (iii) and is highly sensitive to CO₂ and H⁺, activating the rhythm centre (z). So, C-iii-z. D. Peripheral chemoreceptors: Associated with the aortic arch and carotid artery (iv) and recognise changes in CO₂ and H⁺ concentrations, sending signals to the rhythm centre (w). So, D-iv-w. Therefore, the correct match is A-ii-x, B-i-y, C-iii-z, D-iv-w.
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