Peripheral and central chemoreceptors may both contribute to the increased ventilation that occurs as a result of which of the following?
Correct Answer: An increase in aerial carbon dioxide tension
Description: The central chemoreceptors located on or near the ventral surface of the medulla cause an increase in ventilation in response to an increase in PacO2 and to a lesser extent to a decrease in aerial pH because the blood brain barrier is relatively impermeable to hydrogen ions. The peripheral chemoreceptors in the carotid bodies cause an increase in ventilation in response to an increase in PacO2 a decrease in aerial pH, and a decrease in PaO2. Neither the central chemoreceptors nor the carotid bodies are stimulated by a decrease in aerial blood pressure or O2 content.
Category:
Surgery
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now