Practice question

Hematopoietic stem cells residing in specialized bone marrow niches generate diverse mature blood lineages including erythroid, megakaryocytic, myeloid and lymphoid branches but do not produce neural, skeletal muscle, or extraembryonic trophoblast under physiological conditions in vivo. This pattern of generating multiple differentiated types related within one physiological system but limited outside defines multipotency precisely. Multipotent stem cells are lineage-restricted compared with pluripotent embryonic stem cells, yet maintain extensive self-renewal and produce several distinct terminal types through successive oligopotent progenitor intermediates regulated by master transcription factors GATA, PU.1, and Ikaros governing commitment.