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How many factors shift the oxygen dissoc...

How many factors shift the oxygen dissociation curve to the right shift?
i Low partial pressure of oxygen
ii High concentration of carbon dioxide
iii High number of hydrogen ions
iv Low body temperature
v Daily exercise
vi Haemoglobin of babies or fetal haemoglobin

A

6

B

5

C

4

D

3

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many factors shift the oxygen dissociation curve to the right, we need to analyze each of the given factors one by one. 1. **Low partial pressure of oxygen**: - When the partial pressure of oxygen is low, hemoglobin's affinity for oxygen decreases, leading to a rightward shift in the oxygen dissociation curve. - **Conclusion**: This factor shifts the curve to the right. 2. **High concentration of carbon dioxide**: - An increase in carbon dioxide concentration in the blood leads to a decrease in pH (more acidic), which also decreases hemoglobin's affinity for oxygen, causing a rightward shift in the curve. - **Conclusion**: This factor shifts the curve to the right. 3. **High number of hydrogen ions**: - A high concentration of hydrogen ions (low pH) also decreases hemoglobin's affinity for oxygen, resulting in a rightward shift in the curve. - **Conclusion**: This factor shifts the curve to the right. 4. **Low body temperature**: - Lower body temperature increases hemoglobin's affinity for oxygen, causing a leftward shift in the oxygen dissociation curve. - **Conclusion**: This factor does not shift the curve to the right. 5. **Daily exercise**: - While exercise can lead to increased carbon dioxide and lactic acid levels in the blood, which would shift the curve to the right, the factor itself is not directly linked to the curve shift. Therefore, we cannot count this as a definite factor. - **Conclusion**: This factor is not clearly defined in terms of shifting the curve. 6. **Hemoglobin of babies or fetal hemoglobin**: - Fetal hemoglobin has a lower affinity for oxygen compared to adult hemoglobin, which allows it to capture oxygen more effectively in low-oxygen environments, thus shifting the curve to the right. - **Conclusion**: This factor shifts the curve to the right. Now, let's summarize the factors that shift the oxygen dissociation curve to the right: - Low partial pressure of oxygen - High concentration of carbon dioxide - High number of hydrogen ions - Hemoglobin of babies or fetal hemoglobin Thus, there are **4 factors** that shift the oxygen dissociation curve to the right. ### Final Answer: 4 factors shift the oxygen dissociation curve to the right. ---
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