Calculating Lung Volume in Humans . In human lungs, oxygen and carbon dioxide are exchanged in the blood within many small sacs called alveoli. Alveoli provide a large surface area for gas exchange. Recent careful measurements show that the total number of alveoli in a typical human lung pair is about 480 × 10 6 and that the average volume of a single alveclus is 4.2 × 10 6 μm 3 . (Recall the equation for the volume of a sphere, V = 4 3 πr 3 and the equation for the area of a sphere. A = 4 πr 2 .) 57. What is the total volume of the gas-exchanging region of the lungs? A. 2000 μm 3 B. 2m 3 C. 2.0 L D. 120 L
Calculating Lung Volume in Humans . In human lungs, oxygen and carbon dioxide are exchanged in the blood within many small sacs called alveoli. Alveoli provide a large surface area for gas exchange. Recent careful measurements show that the total number of alveoli in a typical human lung pair is about 480 × 10 6 and that the average volume of a single alveclus is 4.2 × 10 6 μm 3 . (Recall the equation for the volume of a sphere, V = 4 3 πr 3 and the equation for the area of a sphere. A = 4 πr 2 .) 57. What is the total volume of the gas-exchanging region of the lungs? A. 2000 μm 3 B. 2m 3 C. 2.0 L D. 120 L
Calculating Lung Volume in Humans. In human lungs, oxygen and carbon dioxide are exchanged in the blood within many small sacs called alveoli. Alveoli provide a large surface area for gas exchange. Recent careful measurements show that the total number of alveoli in a typical human lung pair is about 480 × 106 and that the average volume of a single alveclus is 4.2 × 106 μm3. (Recall the equation for the volume of a sphere, V =
4
3
πr3 and the equation for the area of a sphere. A = 4 πr2.)
57. What is the total volume of the gas-exchanging region of the lungs?
Calculating lung volume in humans. In humans, oxygen and carbon
dioxide are exchanged in the blood within many small sacs called alveoli
in the lungs. Alveoli provide a large surface area for gas exchange. Recent
careful measurements show that the total number of alveoli in a typical
pair of lungs is about 480 x 10 6 and that the average volume of a single
alveolus is 4.2 x 10 6 cubic micrometer.
A typical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 9.000 nm thick. What is the volume of the cell including the membrane?
To simplify the calculations, model the cell as a sphere.
total volumetotal volume: ?
What is the volume of the cell membrane?
membrane volume:
What percent of the total volume does its membrane occupy?
membrane percentage:
Two types of barrel units were in use in the 1920s in the United States. The apple barrel had a legally set volume of 7056 cubic inches; the cranberry barrel, 5826 cubic inches. If a merchant sells 30 cranberry barrels of goods to a customer who thinks he is receiving apple barrels, what is the discrepancy in the shipment volume in liters (L)? Give your answer as a positive number.
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