Exchange of Gases

The figure given below shows a small part of human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function?

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The exchange of gases in the alveoli of the lungs takes place during respiration. Identify the labeling a-e.

Which among the given ones is the most probable reason for higher diffusion rate of CO₂ than O₂ through diffusion membrane, for per unit difference in partial pressure?

The Partial Pressures (in Mm Hg) of Oxygen (O₂) And Carbon Dioxide (CO₂) at alveoli (the site of diffusion) are-

Which of the following is not true?

In alveolar air, the partial pressure of ${\mathrm{CO}}_2$ is

The blood leaving the lungs has all its haemoglobin oxygenated and gives up oxygen to the tissues because

Study the following figure.

Identify the parts from $\mathrm{A}$ to $\mathrm{C}$.

Name the blood vessel from A to D.

Choose the right sequential phenomena during the passage of ${\mathrm{CO}}_2$ from blood to tissues.

P: Absorption of ${\mathrm{CO}}_2$ by blood.
Q: Reaction of ${\mathrm{CO}}_2$ with water forming ${\mathrm{H}}_2{\mathrm{CO}}_3$ inside $\mathrm{RBCs}$ and then into ${\mathrm{HCO}}_3^{-}$and ${\mathrm{H}}^{+}$ ions.
R: Reaction of ${\mathrm{CO}}_2$ with water forming${\mathrm{H}}_2{\mathrm{CO}}_3$ inside plasma followed by conversion into ${\mathrm{H}}^{+}$and ${\mathrm{HCO}}_3^{-}$ ions.
S: Combination of ${\mathrm{H}}^{+}$with haeme part of ${\mathrm{HbO}}_2$ to release ${\mathrm{O}}_2$.
T: Combination of ${\mathrm{HCO}}_3$ with haeme part of $$${\mathrm{HbO}}_2$ to form reduced haemoglobin and release of ${\mathrm{O}}_2$.

Oxygen binding to haemoglobin is

The blood coming out of lungs is richer than that entering into lungs in

Which of the following statements is correct?

The total thickness of respiratory diffusion membrane is

What is the value of ${\mathrm{pO}}_2$ (in deoxygenated blood) minus ${\mathrm{pCO}}_2$ (in deoxygenated blood)?

The solubility of ${\mathrm{CO}}_2$ is _____ times higher than that of ${\mathrm{O}}_2$

Respiratory diffusion membrane is majorly made of _____layers

The diffusion membrane is made up of

Explain the exchange of gasses at the alveolar level.