Bone marrow releases red blood cells into the circulation on demand, under stress, or when the cells have matured. Which of the following are examples of young or immature red blood cells?

Question

Quizplus · Accepted Answer

Mature red blood cells circulate in the blood without a cell nucleus. Although red blood cells have a nucleus early in their development, the nucleus is shed during cellular maturation. Nucleated red blood cells are released into the circulation under conditions of physiological stress (e.g., in sepsis). Reticulocytes are immature cells in the final stage of red blood cell maturation. The darkly staining reticulum of a reticulocyte is the remnant of the cell's endoplasmic reticulum. A megakaryocyte is the source cell from which circulating platelets fragment. A normocyte is a normal-sized red blood cell.

Bone Marrow Releases Red Blood Cells into the Circulation on Demand