MSK System Embryology 1

Question 1

What germ layer forms smooth muscle coat?

Answer 1

Mesoderm

Question 2

What germ layer forms smooth muscle?

Answer 2

Mesoderm

Question 3

What germ layer forms the skeleton?

Answer 3

Mesoderm

Question 4

What germ layer forms the striated muscle?

Answer 4

Mesoderm

Question 5

These paired blocks of mesoderm give rise to skeletal muscle?

Answer 5

Somites

Question 6

What are the 3 layers that the somite splits into?

Answer 6

Myotome layer, dermatome layer, and sclerotome layer

Question 7

What are the 4 supports cells (fibroblasts, chondrocytes, osteoblasts, and myofibroblasts) derived from?

Answer 7

Mesenchyme (mesoderm tissue that can develop into skeletal or connective tissue).

Question 8

What activates the transcription of muscle specific genes and myogenic cell differentiation?

Answer 8

MyoD

Question 9

How do limb muscles develop?

Answer 9

Cells migrate from the ventral dermomyotome of somites and form limb buds

Question 10

What happens to the cells when they move into limb buds?

Answer 10

They undergo epitheliomesenchyma transformation