Practice question

Self-renewal and differentiation capacity together constitute fundamental defining traits across all stem cell classifications from embryonic to adult. Self-renewal allows maintenance of undiminished pool through repeated mitotic cycles without loss of potency or accumulation of senescence, while differentiation produces specialized progeny acquiring distinct morphological and functional characteristics such as contractility or secretion. This duality is governed by precise balance of core transcription factors like Oct4, Sox2, lineage regulators, and niche-derived cues controlling symmetric versus asymmetric division orientation. Solely symmetric division or single lineage production or restriction to embryonic stages are individually insufficient descriptors of true stemness broadly.