Final answer:
Normocytic anemia can result in a normal red blood cell count but still have low hemoglobin levels. The causes can include chronic pulmonary disease, living at high altitudes, or congestive heart failure.
Step-by-step explanation:
Anemia is a condition where there is an inadequate volume of red blood cells, leading to a lack of oxygen in the body. It can be caused by various factors, such as excessive bleeding, inherited disorders, or nutritional deficiencies.
One type of anemia, called normocytic anemia, can result in a normal red blood cell count but still have low hemoglobin levels. This can occur due to factors like chronic pulmonary disease, living at high altitudes, or congestive heart failure.