Question

Receptors associated with the aortic arch and carotid artery can recognize the changes in ___A___ and $H^{+}$ concentration and send necessary signals to the ____B___ for remedial actions.

Select the right choice for A and B to complete the given statement.

• A. A - $O{H}^{-}$; B - cerebellum
• B. A - $O_2$; B - spinal cord
• C. A - $C{O}_2$; B - rhythm centre in medulla oblongata
• D. A - blood circulation; B - cerebrum

Answer 1

The correct option is C A - $C{O}_2$; B - rhythm centre in medulla oblongata

Receptors associated with the aortic arch and carotid artery recognise changes in $C{O}_2$ and $H^{+}$ ion concentration and send necessary signals to the respiratory rhythm centre of the medulla oblongata for remedial actions. The role of oxygen in the regulation of respiratory rhythm is quite insignificant. Thus option c is the correct answer.