What will happen if a person stop his breath for some time? 1-conc. CO2 and H+ in atrial blood increase, 2-chemosensitive area situated adjacent to rhythm centre activated, c-oxygen dissociation curve sifts to right, d-all
- When a person stops his breath for some time, there is no supply of oxygen to the blood and the tissues.
- As a result, the concentration of CO2 and H+ ions in the blood increases.
- A specialised centre present in the medulla region of the brain called respiratory rhythm centre is primarily responsible for the regulation of respiration. A chemosensitive area is situated adjacent to the rhythm centre which is highly sensitive to CO2 and hydrogen ions. Increase in these substances can activate this centre, which in turn can signal the rhythm centre to make necessary adjustments in the respiratory process by which these substances can be eliminated.
- Factors that move the oxygen dissociation curve to the right are those physiological states where tissues need more oxygen. When a person holds his breath, there is a requirement of more oxygen and hence, the curve shift shifts to the right.
- So, the correct answer is option 4 - All
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