Multiple choice

Stem cell factor is produced mainly by

  1. thymic epithelium

  2. the bone marrow stromal cells

  3. stem cell

  4. megakaryocytes

  5. reticuloendothelial system
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The bone marrow stromal cells comprise a complex mixture of cells including fibroblasts, macrophages and various other cell types. Stem cell factor (SCF) remains associated with the extracellular matrix and acts on primitive stem cells through a tyrosine kinase membrane receptor.

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