Chapter 1- Epidermis- Granular Layer

Question 1

The stratum granulosum is thicker in the nonhaired skin or the haired skin?

Answer 1

Nonhaired skin

Question 2

Granular layer is variably present in haired or nonhaired skin?

Answer 2

haired skin

Question 3

How thick is the granular layer in haired skin? non haired skin?

Answer 3

1-2 cells; 4 to 8 cells

Question 4

What is the shape of cells in the granular layer? color?

Answer 4

flattened; basophilic

Question 5

Describe the nuclei in the cells of the granular layer

Answer 5

shrunken nuclei

Question 6

Describe the size and color of the keratohyalin granules in the cytoplasm of granular layer cells

Answer 6

deeply basophilic, large

Question 7

In what layer are keratohyalin granules synthesized? Are these true granules- why or why not?

Answer 7

stratum granulosum; no; they lack a membrane- more accurately describes as insoluble aggregates

Question 8

Keratohyalin graunles are composed of what three structures?

Answer 8

profilaggrin; keratine filaments; loricin

Question 9

Filaggrin degradation products are important for what purpses?

Answer 9

normal stratum corneum hydration; filtering UV radiation