Anemia is characterized by
**Core Concept**
Anemia is a clinical condition defined by a decrease in the number of red blood cells or the amount of hemoglobin in the blood, leading to reduced oxygen delivery to tissues and organs. This can result from various causes, including blood loss, inadequate production, or increased destruction of red blood cells.
**Why the Correct Answer is Right**
The correct definition of anemia involves a decrease in either the red blood cell count or the hemoglobin concentration. Hemoglobin is a crucial protein in red blood cells responsible for binding oxygen and transporting it to tissues. A deficiency in hemoglobin or red blood cells impairs the body's ability to deliver oxygen, leading to symptoms such as fatigue, weakness, and shortness of breath.
**Why Each Wrong Option is Incorrect**
**Option A:** Anemia is characterized by an increase in red blood cell count.
* This option is incorrect because anemia is defined by a decrease in red blood cell count or hemoglobin concentration, not an increase.
**Option B:** Anemia is a condition of increased oxygen delivery to tissues and organs.
* This option is incorrect because anemia results in reduced oxygen delivery to tissues and organs, not increased.
**Option C:** Anemia is a condition of decreased blood pressure.
* This option is incorrect because anemia is related to the number and hemoglobin content of red blood cells, not blood pressure.
**Clinical Pearl / High-Yield Fact**
One of the key consequences of anemia is impaired oxygen delivery to tissues, which can lead to tissue hypoxia and organ dysfunction. This highlights the importance of promptly diagnosing and treating anemia to prevent long-term complications.
**Correct Answer:** C.