A person is re-breathing air from a closed bag, leading to an increase in the…
Biology · NEET · NTA Exams — Breathing and Exchange of Gases
A person is re-breathing air from a closed bag, leading to an increase in the concentration of CO₂ and H⁺ in the blood. According to the chapter, which of the following will occur?
I. The primary stimulus for this regulatory change is a decrease in oxygen concentration.
II. Receptors in the aortic arch and carotid artery will send signals to the rhythm centre.
III. The pneumotaxic centre in the pons will be inhibited.
IV. The chemosensitive area adjacent to the rhythm centre will be activated.
V. The respiratory rhythm centre in the medulla will be signalled to increase the breathing rate.
Choose the correct option from the following:
- II, III and V only
- I, II and IV only
- IV and V only
- II, IV and V only
Answer
(D) II, IV and V only
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