Question

Chemoreceptors located in the aortic and carotid bodies stimulate the respiratory control center in the brain when the blood __________ decreases.

Answer 1

When the blood pH drops, chemoreceptors in the aorta and carotid bodies activate the brain's respiratory control center.

What are the measurements made by chemosensors present in the circulatory system and body?

Chemoreceptors monitor the amounts of hydrogen ions in the blood to determine the quantities of carbon dioxide there.

What circumstance would the respiratory centers encourage more ventilation in?

Peripheral chemoreceptors that detect falling or more acidic pH levels trigger increased ventilation to accelerate the removal of carbon dioxide from the blood. The body's medulla, which houses the body's respiratory center, is typically stimulated by an increase in carbon dioxide concentration and, to a lesser extent, by a decrease in oxygen levels in arterial blood.

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