How does methemoglobin differ from normal hemoglobin in terms of its ability to bind oxygen?
A
Methemoglobin has a higher affinity for oxygen than normal hemoglobin
B
Methemoglobin has a lower affinity for oxygen than normal hemoglobin
C
Methemoglobin cannot bind oxygen at all
✓
D
Methemoglobin binds oxygen but does not release it to tissues
Explanation
Methemoglobin is a form of hemoglobin that is unable to bind oxygen, which can lead to tissue hypoxia if levels become too high.
Source
Harrison's Principles of Internal Medicine
Hematology
Hematology: Hemoglobin and Oxygen Transport
Hematology: Hemoglobin and Oxygen Transport
Medium
MEDICAL
Confidence: high
