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Regulation of Respiration

When CO2 conc...

Question

When $C O_{2}$ concentration decreases, the rhythm centre of the brain is signalled to make the necessary changes.

A

False

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B

True

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Solution

The correct option is A False

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Q. Assertion :The role of oxygen in the regulation of respiratory rhythm is quite insignificant. Reason: Increased P

C O_{2}

and H+ concentration inputs from chemoreceptors can activate respiratory rhythm centre to make necessary adjustments.

Q. In response to

C O_{2}

concentration, the chemosensitive area and, receptors associated with aortic arch and carotid artery, send necessary signals for remedial actions to:

Q. Fill up the blanks in the following paragraph by selecting the correct option.
Human beings have a significant ability to maintain and moderate the respiratory rhythm, to suit the demands of the body tissues. This is done by the neural system. A specialised centre present in the medulla region of the brain called ___(i)___ is primarily responsible for this regulation. Another centre present in the pons region of the brain called ___(ii)___ can moderate the functions of the respiratory rhythm centre. Neural signal from this centre can reduce the duration of ___(iii)___ and thereby alter the respiratory rate. A __(iv)__ is situated adjacent to the rhythm centre which is highly sensitive to

C O_{2}

and hydrogen ions.

Q. In response to

C O_{2}

H^{+}

concentration, the chemosensitive area and, receptors associated with aortic arch and carotid artery, send necessary signals for remedial action to _______________.

The respiratory centre in the brain is stimulated by $C O_{2}$

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Regulation of Respiration

Standard XI Biology

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