1. A person who has a dead space voume of 150 mL, a tidal volume of 550mL and wa
ID: 3506460 • Letter: 1
Question
1. A person who has a dead space voume of 150 mL, a tidal volume of 550mL and was breathing through a tube with a volume of 350mL. How much air would reach the alveoli per breath? a) 550 mL/ breath b)50 mL / breath c)250 mL/ breath d)500 mL/ breath e) 150 mL/ breath 2. In a healthy person, the FEVl (forced expiratory volume in one second) is about of the a) 85% b)60% c) 35% d) 85% e) 100% expiratory reserve volume (ERV) forced vital capacity (FVC) .. . . total lung capacity (TLC) . inspiratory reserve volume(IRV) 3. The most importance factor limiting the breath-hold time is: a) the depression of the brainstem respiratory centres. b) fatigue of the diaphragm. c) the value of arterial PCO2. d)the value of the arterial PO2. e) the pH of the cerebrospinal fuid. 4. Below is a Spirograph from a patient who has completed a lung function test. The tidal volume is the Expiratory Reserve Volume is and FEV1FVC is Tune (seconds) a) 500 mL b) 220 ) 1.88L d) 375 mL 1.5 L 1.88L 2.31L 0.381L ~20% ~60% . .. -40%Explanation / Answer
Answer 2—In a healthy person the FEV1 (forced expiratory reserve volume in one second ) is about 85% of the forced vital capacity.
Discussion- (FEV) measures how much air a person can exhale during a forced breath. The amount of air exhaled may be measured during the first (FEV1), second (FEV2), and/or third seconds (FEV3) of the forced breath. The important value is the fraction of the total “forced” vital capacity expired in 1 s. Normal individual can expire approximately 80 percent of the vital capacity in this time. Forced vital capacity (FVC) is the total amount of air exhaled during the FEV test.
Answer 3- The most important factor limiting the breath hold time is
Correct answer is C the value of arterial pCO2.
Answer 4-The tidal volume is 375 ml th expiratory reserve volume is 0.38 L and FEV1/FVC is 40%
Correct answer is D.
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