Q.

Which of the following can activate the chemosensitive area situated adjacent to the rhythm centre?

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a

High CO2 concentration, less H+ concentration

b

High CO2 concentration, high H+ concentration

c

Less CO2 concentration, high H+ concentration

d

Less CO2 concentration, less H+ concentration

answer is B.

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Detailed Solution

A chemosensitive area is situated adjacent to the rhythm centre which is highly sensitive to CO2and hydrogen ions. Increase in CO2 and H+ ions 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.
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