During oxygen transport the oxyhaemoglobin at the tissue...

During oxygen transport the oxyhaemoglobin at the tissue level liberates oxygen to the cells because in tissue (a) $\mathrm{O}_{2}$ concentration is high and $\mathrm{CO}_{2}$ is low. (b) $\mathrm{O}_{2}$ concentration is low and $\mathrm{CO}_{2}$ is also low. (c) $\mathrm{O}_{2}$ tension is high and $\mathrm{CO}_{2}$ tension is low. (d) $\mathrm{O}_{2}$ tension is low and $\mathrm{CO}_{2}$ tension is high.

During oxygen transport the oxyhaemoglobin at the tissue level liberates oxygen to the cells because in tissue
(a) $\mathrm{O}_{2}$ concentration is high and $\mathrm{CO}_{2}$ is low.
(b) $\mathrm{O}_{2}$ concentration is low and $\mathrm{CO}_{2}$ is also low.
(c) $\mathrm{O}_{2}$ tension is high and $\mathrm{CO}_{2}$ tension is low.
(d) $\mathrm{O}_{2}$ tension is low and $\mathrm{CO}_{2}$ tension is high.

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Key Concepts

Bohr Effect

This concept explains how an increase in carbon dioxide levels and a decrease in pH in the tissues reduce hemoglobin's affinity for oxygen. As a result, oxygen is more readily released from oxyhaemoglobin in areas where carbon dioxide is high, facilitating gas exchange at the cellular level.

Partial Pressure Gradients

Partial pressure refers to the pressure exerted by individual gases in a mixture. In the context of oxygen transport, the difference in oxygen and carbon dioxide tensions between the lungs and tissues creates a gradient that drives the diffusion of gases. Lower oxygen pressure and higher carbon dioxide pressure in the tissues promote the unloading of oxygen from hemoglobin.

Oxyhaemoglobin Dissociation Curve

This curve illustrates the relationship between the oxygen saturation of hemoglobin and the partial pressure of oxygen. It shows how factors such as increased carbon dioxide levels, reduced pH, and elevated temperature can shift the curve to the right, reducing hemoglobin's affinity for oxygen and enhancing oxygen release in tissues.

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