G6PD help in maintaining the integrity of RBC by?
**Core Concept**
G6PD (Glucose-6-phosphate dehydrogenase) is an enzyme that plays a crucial role in protecting red blood cells (RBCs) from oxidative damage. It is a key component of the pentose phosphate pathway, which generates NADPH to maintain the integrity of RBCs.
**Why the Correct Answer is Right**
G6PD helps to maintain RBC integrity by preventing the oxidation of hemoglobin, which can lead to hemolysis (breakdown of RBCs). When RBCs are exposed to oxidative stress, G6PD generates NADPH, which in turn reduces glutathione, a powerful antioxidant that protects hemoglobin from oxidative damage. This process helps to maintain the structural integrity of RBCs and prevent their premature destruction.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because G6PD does not directly regulate RBC membrane stability.
**Option B:** This option is incorrect because G6PD is not involved in the regulation of RBC membrane fluidity.
**Option C:** This option is incorrect because G6PD is not directly involved in the regulation of RBC ion balance.
**Clinical Pearl / High-Yield Fact**
G6PD deficiency is a common genetic disorder that affects approximately 400 million people worldwide, making it a significant public health concern. Individuals with G6PD deficiency are more susceptible to hemolysis in response to oxidative stress, which can be triggered by certain medications, infections, or foods.
**Correct Answer: C. Maintaining the structural integrity of RBCs.**