Given below is a list of different steps $(i-vi)$ involved in respiration.
(i) Utilisation of $O_2$ by the cells for catabolic reactions.
(ii) Transport of gases by the blood.
(iii) Pulmonary ventilation by which atmospheric air is drawn in and $CO_2$ is released out.
(iv) Release of resultant $CO_2$.
(v) Diffusion of $O_2$ and $CO_2$ between blood and tissues.
(vi) Diffusion of gases ($O_2$ and $CO_2$) across alveolar tissues.
Select an option which has correct sequence of all the steps.
- $(iii), (vi), (ii), (v), (i), (iv)$
- $(iii), (vi), (i), (v), (ii), (iv)$
- $(iv), (ii), (v), (iii), (i), (vi)$
- $(iv), (vi), (ii), (v), (i), (iii)$
The Correct Option is A
Solution and Explanation
Top Questions on Exchange Of Gases
Which of the following statements about the pharynx and larynx is/are correct?
(1) The pharynx serves as a pathway for both food and air.
(2) The larynx is involved in the production of sound.
(3) The pharynx contains the vocal cords.
(4) The larynx prevents food from entering the trachea.
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Statement I: Greenhouse gases are increasing due to industrial development, exponential increase in energy production and use
Statement II: Increase in the concentration of greenhouse gases is directly dependent upon anthropogenic activities.
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Concepts Used:
Breathing and Exchange of Gases
A metabolic process, which is carried out by all living organisms including plants, animals, and humans for the production of energy and to stay alive is Respiration. Except for required anaerobes, every other organism from amoeba to humans needs oxygen for survival. And evolution has reported a number of systems that allows the exchange of gases in organisms.
There are two types of respiration such as;
- Aerobic respiration — to produce energy, it occurs in the presence of oxygen
- Anaerobic respiration — to produce energy, occurs in the absence of oxygen
Breathing can be simply derived as the process of inhaling oxygen gas from the atmosphere and exhaling the carbon dioxide gas back into the atmosphere is termed breathing and the process is commonly known as respiration.
Read More: Breathing and Exchange of Gases