The volume of air in the lungs and the rate at which it is exchanged during inspiration and expiration was measured. The following diagram shows a group of the lung volumes and capacities: Study the diagram carefully and explain briefly the following: (a) Tidal volume. (b) Inspiratory reserve volume. (c) Expiratory reserve volume. (d) Vital capacity. (e) Residual volume.
(a) Tidal volume - It is the air breathed in and out in a normal quiet breathing is known as tidal volume. The tidal volume(TV) is 500 mL.
(b) Inspiratory reserve volume - Air that can be drawn in forcibly over and above the tidal air is known as inspiratory reserve volume. It is referred to as IRV or complemental air and is 3000 mL.
(c) Expiratory reserve volume - It is the air that can be expelled out forcibly after a normal expiration. It is referred to as ERV or supplemental air and is 1000 mL.
(d) Vital capacity (VC) - It is the volume of air that can be inhaled and exhaled by maximum inspiration and expiration respectively and is about 4500mL.
(e) Residual volume (RV) - Even after forcible expiration, there is some air left in the lungs and is referred to as residual volume. It is about 1500 mL.
Match the items given in column I with those in column II and select the correct options given below: Column I Column II a. Tidal volume 1 2500-3000 mL b. Inspiratory Reserve volume 2 1100-1200 mL c. Expiratory Reserve volume 3 500-550 mL d. Residual volume 4 1000-1100 mL
Tidal Volume and Expiratory Reserve Volume of an athlete is $$500$$mL and $$1000$$mL, respectively. What will be his Expiratory Capacity if the Residual Volume is $$1200$$mL?
What will be the $$pO_2$$ and $$pCO_2$$ in the atmospheric air compared to those in the alveolar air? (i) $$pO_2$$ lesser, $$pCO_2$$ higher (ii) $$pO_2$$higher, $$pCO_2$$ lesser (iii) $$pO_2$$higher, $$pCO_2$$ higher (iv) $$pO_2$$ lesser, $$pCO_2$$ leser
What is the effect of $$pCO_2$$ on oxygen transport?
What is a tidal volume? Find out the tidal volume (approximate value) for a healthy human in an hour.
Vital capacity of lungs is
Match column I with column II and select the correct option from the given codes. Column I Column II A. Tidal volume (i)2500-3000 mL of air B. Inspiratory reserve volume (ii) 1000 mL of air C. Expiratory reserve volume (iii) 500 mL of air D. Residual volume (iv) 3400-4800 mL of air E. Vital capacity (v) 1200 mL of air
Which of the following statements is correct?
Choose the odd one out in each of the following groups of four items each: (a) Trachea, Bronchus, Alveolus, Diaphragm. (b) Ethyl alcohol, Carbon dioxide, Starch, Oxygen absence. (c) Diffusion, Respiratory gases, Alveoli, Capillary network. (d) Trachea, ciliated epithelium, mucus, diffusion. (e) Oxyhaemoglobin, carbaminohaemoglobin, Hypoxia, Carboxyheamoglobin. (f) Hairy, Moist, Nostril, Vocal cord.
Which one has the lowest value?