A patient with iron deficiency anemia has been prescribed ferrous sulfate. What is the expected pharmacologic action of ferrous sulfate?

A. Becomes part of hemoglobin and myoglobin to help carry and store oxygen throughout the body: Ferrous sulfate provides elemental iron, which is incorporated into hemoglobin and myoglobin. This increases the oxygen-carrying capacity of red blood cells and improves tissue oxygenation, directly addressing iron deficiency anemia. B. Increases heart rate and blood pressure: Ferrous sulfate does not have a direct effect on heart rate or blood pressure. Any changes in cardiovascular function are typically secondary to correction of anemia, not a pharmacologic action of the drug itself. C. Promotes calcium absorption in the bones: Calcium absorption is not influenced by iron supplementation. Ferrous sulfate specifically targets hemoglobin and iron stores, not bone metabolism. D. Enhances glucose metabolism: Iron supplementation does not affect glucose metabolism. Its therapeutic effect is limited to restoring iron levels and improving oxygen transport in the body.