Question 13 Distinguish between
(a) IRV and ERV
(b) Inspiratory capacity and Expiratory capacity
(c) Vital capacity and Total lung capacity
Class - XI - Biology Chapter Breathing and Exchange of Gases Page No. 277
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a) Inspiratory reserve volume (IRV)
Expiratory reserve volume (ERV)
1. It is the maximum volume of air that can be inhaled after a normal inspiration.
2. It is about 2500 – 3500 mL in the human lungs.
1. It is the maximum volume of air that can be exhaled after a normal expiration.
2. It is about 1000 – 1100 mL in the human lungs.
(b)Inspiratory capacity (IC) Expiratory capacity (EC)
1. It is the volume of air that can be inhaled after a normal expiration.
2. It includes tidal volume and inspiratory reserve volume. IC = TV IRV
1. It is the volume of air that can be exhaled after a normal inspiration.
2. It includes tidal volume and expiratory reserve volume.
EC = TV ERV
(c)Vital capacity (VC) Total lung capacity (TLC)
1. It is the maximum volume of air that can be exhaled after a maximum inspiration. It includes IC and ERV.
2. It is about 4000 mL in the human lungs.
1. It is the volume of air in the lungs after maximum inspiration. It includes IC, ERV, and residual volume.
2. It is about 5000 – 6000 mL in the human lungs.
Expiratory reserve volume (ERV)
1. It is the maximum volume of air that can be inhaled after a normal inspiration.
2. It is about 2500 – 3500 mL in the human lungs.
1. It is the maximum volume of air that can be exhaled after a normal expiration.
2. It is about 1000 – 1100 mL in the human lungs.
(b)Inspiratory capacity (IC) Expiratory capacity (EC)
1. It is the volume of air that can be inhaled after a normal expiration.
2. It includes tidal volume and inspiratory reserve volume. IC = TV IRV
1. It is the volume of air that can be exhaled after a normal inspiration.
2. It includes tidal volume and expiratory reserve volume.
EC = TV ERV
(c)Vital capacity (VC) Total lung capacity (TLC)
1. It is the maximum volume of air that can be exhaled after a maximum inspiration. It includes IC and ERV.
2. It is about 4000 mL in the human lungs.
1. It is the volume of air in the lungs after maximum inspiration. It includes IC, ERV, and residual volume.
2. It is about 5000 – 6000 mL in the human lungs.
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(a) IRV and ERV
Inspiratory reserve volume(IRV)
Expiratory reserve volume (ERV)
It is the maximum volume of air that can be inhaled after a normal inspiration.It is the maximum volume of air that can be exhaled after a normal expiration.It is about 2500-3500 mL in the human lungs.It is about 1000-1100 mL in the human lungs.
(b) Inspiratory capacity and Expiratory capacity
Inspiratory capacity (IC)
Expiratory capacity (EC)
It is the volume of air that can be inhaled after a normal expiration.It is the volume of air that can be exhaled after a normal inspiration.It includes tidal volume and inspiratory reserve volume. (IC = TV + IRV)It includes tidal volume and expiratory reserve volume. (EC = TV + ERV)
(c) Vital capacity and Total lung capacity
Vital capacity (VC)
Total lung capacity (TLC)
It is the maximum volume of air that can be exhaled after a maximum inspiration. It is the volume of air in the lungs after maximum inspiration. It includes IC, ERV, and residual volume.It includes IC and ERVIt includes IC, ERV, and residual volume.It is about 4000 mL in the human lungs.It is about 5000-6000 mL in the human lungs.
Inspiratory reserve volume(IRV)
Expiratory reserve volume (ERV)
It is the maximum volume of air that can be inhaled after a normal inspiration.It is the maximum volume of air that can be exhaled after a normal expiration.It is about 2500-3500 mL in the human lungs.It is about 1000-1100 mL in the human lungs.
(b) Inspiratory capacity and Expiratory capacity
Inspiratory capacity (IC)
Expiratory capacity (EC)
It is the volume of air that can be inhaled after a normal expiration.It is the volume of air that can be exhaled after a normal inspiration.It includes tidal volume and inspiratory reserve volume. (IC = TV + IRV)It includes tidal volume and expiratory reserve volume. (EC = TV + ERV)
(c) Vital capacity and Total lung capacity
Vital capacity (VC)
Total lung capacity (TLC)
It is the maximum volume of air that can be exhaled after a maximum inspiration. It is the volume of air in the lungs after maximum inspiration. It includes IC, ERV, and residual volume.It includes IC and ERVIt includes IC, ERV, and residual volume.It is about 4000 mL in the human lungs.It is about 5000-6000 mL in the human lungs.
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