What is the sequence of cells listed from most immature to most mature?

What is the sequence of cells listed from most immature to most mature?

• A. Rubriblast, reticulocyte, rubricyte, erythrocyte
• B. Rubriblast, rubricyte, reticulocyte, erythrocyte
• C. Rubriblast, rubricyte, erythrocyte, reticulocyte
• D. Reticulocyte, rubriblast, rubricyte, erythrocyte

Answer: (B)

The sequence reflects how red blood cells mature from precursor cells to a fully mature cell. It starts with rubriblast, the earliest RBC precursor in the bone marrow with a large nucleus. As maturation proceeds, the cell becomes rubricyte, which has more cytoplasm and a condensed, continuing to mature nucleus. The next stage is the reticulocyte, an immature red cell that has been released into the bloodstream and will finish maturing to a functional erythrocyte. The final stage is the erythrocyte, a fully mature red blood cell with no nucleus and hemoglobin-rich cytoplasm. So the order from most immature to most mature is rubriblast, rubricyte, reticulocyte, erythrocyte.

The sequence reflects how red blood cells mature from precursor cells to a fully mature cell. It starts with rubriblast, the earliest RBC precursor in the bone marrow with a large nucleus. As maturation proceeds, the cell becomes rubricyte, which has more cytoplasm and a condensed, continuing to mature nucleus. The next stage is the reticulocyte, an immature red cell that has been released into the bloodstream and will finish maturing to a functional erythrocyte. The final stage is the erythrocyte, a fully mature red blood cell with no nucleus and hemoglobin-rich cytoplasm.

So the order from most immature to most mature is rubriblast, rubricyte, reticulocyte, erythrocyte.