First slide

Regulation of Respiration

Question

Chemoreceptors involved in the regulation of ventilation are located in all of the following, except

Easy

A

medulla oblongata.
B

aortic arch
C

carotid artery
D

coronary artery

Solution

Chemoreceptors are specialised neurons that respond to changes in chemicals in solution. The chemoreceptors involved in the regulation of respiration respond to changes in hydrogen ion concentrations, changes in pCO₂, or both. They modulate the activity of the respiratory centres.
Central chemoreceptors are located in the chemosensitive area of the medulla oblongata adjacent to the respiratory rhythm centre.
Peripheral chemoreceptors associated with aortic arch (aortic bodies) and carotid artery (carotid bodies).
Coronary artery has no chemoreceptors that regulate ventilation.

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