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Which of the following statements accurately describes the role of peripheral chemoreceptors in respiration regulation?
Peripheral chemoreceptors are primarily sensitive to changes in oxygen levels.
Peripheral chemoreceptors are located in the medulla oblongata.
Peripheral chemoreceptors are not involved in the regulation of respiration.
Peripheral chemoreceptors respond to changes in carbon dioxide and oxygen levels.
Answers (1)
Peripheral chemoreceptors are specialized sensory receptors located in the carotid bodies and aortic bodies. These chemoreceptors are primarily sensitive to changes in carbon dioxide and oxygen levels in the blood. When there is an increase in CO2 or a decrease in O2, the peripheral chemoreceptors are activated and send signals to the respiratory centers in the brain, primarily the medulla oblongata, to increase the rate and depth of breathing. This helps to restore proper blood gas levels by increasing the removal of CO2 and increasing the intake of O2. Hence, the correct answer is option 4.
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