Integumentary histology

Question 1

What are the 4-5 distinct histological layers of the skin?

Answer 1

1. Stratum basale (deepest)
2. Stratum spinosum
3. Stratum granulosum
4. Stratum lucidum (thick skin only)
5. Stratum corneum

Question 2

What is the difference between “thin skin” and “thick skin”?

Answer 2

4 vs 5 layers: thick skin has Stratum lucidum

Question 3

What layer is not found in thin skin?

Answer 3

Stratum lucidum

Question 4

What layer is the most superficial?

Answer 4

Stratum corneum

Question 5

What layers make up the Stratum germinativum?

Answer 5

Stratum basale and stratum spinosum

Question 6

What is the main function of the stratum germinativum?

Answer 6

site of Vitamin D manufacture (cholecalciferol)

Question 7

Which layer is highly mitotic?

Answer 7

Stratum basale

Question 8

Which layer is made of flattened cells, filled with keratin?

Answer 8

Stratum granulosum

Question 9

Where on the body would you likely find stratum lucidum?

Answer 9

palms of hands and soles of feet (thick skin)

Question 10

Which layer is mitotic only in its deepest layer?

Answer 10

stratum spinosum

Question 11

Which layer synthesizes keratin?

Answer 11

stratum spinosum

Question 12

Which layer is made up of 20-30 layers of flattened, keratinized dead cells?

Answer 12

Stratum corneum