Question 7 0 out of 1.5 points Which of the following is NOT TRUE of ventilation

Question

Question 7 0 out of 1.5 points Which of the following is NOT TRUE of ventilation and perfusion: B. Ventilation and perfusion are modulated at local and global levels A. Perfusion is altered by local factors, some neural influence, and physical factors B. Ventilation and perfusion are modulated at local and global levels C. Ventilation and perfusion are matched to meet the metabolic needs of the cells of the body D. Ventilation is increased only by increasing rate and depth of breathing Selected Answer: Answers: Monday, April 16, 2018 6:01:15 PM EDT OK

Explanation / Answer

B.Ventilation and perfusion are modulated at local global levels.

V/Q mismatch is the most common cause of hypoxemia.Normal V/Q level is 0.8. Ventilation,perfusion and V/Q ratio are not uniform in the human lungs. There is regional heterogeneity of V/Q ratio caused by variable subatmospheric intrapleural pressure and gravity.

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