MSK 24th April 23 - session 2 (development of limbs)

Which germ layer are somites made from?

• Ectoderm

• Mesoderm

• Endoderm

In what week of development do the limb buds usually appear?

• 3rd week

• 4th week

• 5th week

• 6th week

What is the name of the boundary between the ventral and dorsal limb ectoderm?

• Dermatomal boundary

• Partition of the myotome

• Ventral margin

• Axial line

What is a motor unit?

• The muscle fibres innervated by a single motor nerve fibre

• A group of muscles innervated by a single nerve root

Where does secondary ossification occur?

• Periosteum

• Metaphysis

• Epiphysis

• Diaphysis