Question

In mammals, hematopoietic stem cells that give rise to different types of blood cells are known as:

• A. ( totipotent stem cells. )
• B. ( pluripotent stem cells. )
• C. ( myeloid progenitor cells. )
• D. ( lymphoid progenitor cells. )

Hint:

When addressing stem cell types, it's crucial to distinguish between their potential for differentiation. Totipotent cells have the highest potential, pluripotent cells follow, and multipotent cells have a more focused range of differentiation.

Answer 1

The Correct Option is B

Understanding Hematopoietic Stem Cells: Hematopoietic stem cells (HSCs) are special types of stem cells in mammals that are primarily found in the bone marrow. These cells are responsible for the generation of all types of blood cells through a process known as hematopoiesis.
Classification of Stem Cells: Totipotent stem cells are capable of forming an entire organism, including both the embryonic and extraembryonic tissues. Pluripotent stem cells can give rise to cells of all three germ layers but cannot form an entire organism. Multipotent stem cells, like hematopoietic stem cells, can develop into multiple, but limited, cell types. Correct Identification: Among the options given: Totipotent stem cells (A) are incorrect as they have the broadest differentiation potential, beyond what is necessary for blood cell formation. Pluripotent stem cells (B) are the correct answer. While HSCs are traditionally considered multipotent, they fall under the broader category of pluripotency in terms of their ability to differentiate into various types of blood cells. Myeloid and lymphoid progenitor cells (C and D) are more specific types of cells derived from hematopoietic stem cells, not the stem cells themselves.