Arrange the following steps of respiration properly: 1....

Arrange the following steps of respiration properly: 1. Breathing or pulmonary ventilation by which atmospheric air is drawn in and $\mathrm{CO}_{2}$ rich alveolar air is released out. 2. Diffusion of gases $\left(\mathrm{O}_{2}\right.$ and $\mathrm{CO}_{2}$ ) across alveolar membrane. 3. Transport of gases by the blood. 4. Diffusion of $\mathrm{O}_{2}$ and $\mathrm{CO}_{2}$ between blood and tissues. 5. Utilization of $\mathrm{O}_{2}$, by the cells for catabolic reactions and resultant release of $\mathrm{CO}_{2}$. (a) $1,2,3,4,5$ (b) $1,3,2,5,4$ (c) $5,4,3,1,2$ (d) $3,4,5,2,1$

Arrange the following steps of respiration properly:
1. Breathing or pulmonary ventilation by which atmospheric air is drawn in and $\mathrm{CO}_{2}$ rich alveolar air is released out.
2. Diffusion of gases $\left(\mathrm{O}_{2}\right.$ and $\mathrm{CO}_{2}$ ) across alveolar membrane.
3. Transport of gases by the blood.
4. Diffusion of $\mathrm{O}_{2}$ and $\mathrm{CO}_{2}$ between blood and tissues.
5. Utilization of $\mathrm{O}_{2}$, by the cells for catabolic reactions and resultant release of $\mathrm{CO}_{2}$.
(a) $1,2,3,4,5$
(b) $1,3,2,5,4$
(c) $5,4,3,1,2$
(d) $3,4,5,2,1$

Key Concepts

Pulmonary Ventilation

This is the process by which air is moved in and out of the lungs. It involves the mechanical act of breathing, where air is drawn into the lungs to allow oxygen to enter and carbon dioxide to be expelled, thus maintaining the necessary gas concentrations for effective respiration.

Alveolar Gas Exchange

Within the lung alveoli, the exchange of gases takes place by diffusion. Oxygen moves from the alveolar air into the blood, while carbon dioxide diffuses in the opposite direction from the blood into the alveoli, driven by differences in partial pressures.

Circulatory Gas Transport

Once gases are exchanged in the lungs, they are transported by the bloodstream. Oxygen is carried primarily bound to hemoglobin within red blood cells, while carbon dioxide is transported in various forms including dissolved gas, bicarbonate, and carbamino compounds, ensuring delivery to and removal from tissues.

Tissue Gas Exchange

At the tissue level, gases are exchanged between the blood and cells. Oxygen diffuses out of the capillaries into the tissues to support metabolic processes, while carbon dioxide, a byproduct of cellular metabolism, diffuses from the tissues into the blood.

Cellular Respiration

This is the process by which cells use oxygen to convert nutrients into energy, producing carbon dioxide as a waste product. Cellular respiration involves a series of metabolic pathways that ultimately release energy stored in chemical bonds, fueling various cellular functions.

Please give Ace some feedback