C. Lung volumes and vital capacity Respiration rate is the number of times you i
ID: 262322 • Letter: C
Question
C. Lung volumes and vital capacity Respiration rate is the number of times you inhale/exhale per minute. The volume of air entering and leaving your respiratory system is your tidal volume (average tidal volume equals about 500 milliliters or 1 pint). Of this 500 mL, only 350 mL reaches the alveoli of the lungs. The other 150 mL remains in the airway (trachea and bronchial tubes) and is referred to as dead air volume since it does not participate in gas exchange. During forced inhalation, an additional 3100 mL or 3 quarts (inspiratory reserve volume is taken in. Ding exhalation, you can forcibly exhale approximately 1200 mL or 1 quart (expiratory reserve volume of air. 1200 mL of residual volume always remains in your lungs, even after strenuous exhalation. Vital capacity refers to the total volume of air you can move in and out in one breath Activity #4. Label the following graph (a-e) with the italicized terms above mL 6000 5000 4000 3000 2000 1200 a) el b) c) d) a. How much new air is brought into the alveoli with each new breath? b. During normal breathing (i.e. not forcibly exhaling), the functional residual volume of the lungs measures approximately 2400 mL of air. Therefore, what percentage of air reaching the alveoli is actually fresh air or new atmospheric air? c. How could this fact be an advantage if you were subjected to a noxious gas (such as carbon monoxide)?Explanation / Answer
A. Is inspiratory reserved volume
B. Tidal volume
C.
D. Residual volume.
E. Vital capacity
a. Total new or frsh air in each breath is tidal volume - dead space= 500-150=350 ml
b. Total air reaching the alveoli is500 ml and fresh air is 350 ml ,so it makes that 70 percent of fresh air reaching alveoli in each breath .
Or if the functionall resisdual volume js taken into consideration then total air kn alveoli at each breath is 2400 +500=2900ml
Fresh air is 350 ml,which makes only 12 percent fresh air.
c. It is beneficial to the body during noxious gas inhalation as there occurs dilution inside the alveoli and the adverse effect is less.
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