The point on a static pressure-volume curve (SPV) where the alveoli begin to open is referred to as which of the following?
a. Lower inflection point on the inflation limb
b. Upper inflection point on the inflation limb
c. Upper inflection point on the deflation limb
d. Lower inflection point on the deflation limb
ANS: A
At the lower inflection point on the inflation limb, the slope of the line changes significantly. It originally was believed that this point represents the opening of most of the collapsed alveoli. However, it is the point at which the alveoli begin to open. Even at the upper inflection point on the inflation limb, the alveoli are still being recruited in some parts of the lungs.
You might also like to view...
People who are over age 65 but who are not eligible for free Part A coverage may enroll by
A. paying into a Medical Savings Account. B. paying a deductible. C. paying a premium. D. enrolling in a Medicare HMO.
Which of the following is a function of water?
A. It provides a concentrated source of heat and energy. B. It decreases the rate of carbohydrate breakdown and absorption. C. It helps maintain fluid balance in the body and regulates body temperature. D. It serves as an integral part of cell membranes. E. It is involved in bone and tooth formation.