Question

multiple choice question

which stem cells fuse to form a muscle fiber?

fibroblasts
promyocytes
myoblasts
sarcoblasts

Explanation:

Identify the stem cells involved in muscle development

Using the Myogenesis and Muscle Regeneration knowledge points

• Skeletal muscle fibers are multinucleated cells formed during embryonic development.
• Embryonic mesoderm cells differentiate into muscle progenitor cells called myoblasts.
• These myoblasts fuse together end-to-end to form a single, elongated, multinucleated cell known as a muscle fiber (myofiber).

Evaluate the incorrect options

• Fibroblasts: Connective tissue cells that produce collagen and extracellular matrix, not muscle fibers.
• Promyocytes and Sarcoblasts: Non-standard or incorrect terminology for the primary embryonic cells that fuse to form muscle fibers.

Answer:

• (A) Fibroblasts
• (B) Promyocytes
• (C) Myoblasts (Correct answer)
• (D) Sarcoblasts