Epidermis Layers

Question 1

What happens in Stratum basale

Answer 1

Active mitosis

Question 2

What happens to the daughter cells in the stratum basale

Answer 2

Own travels to the surface and dies along the way. Other acts as a stem cell in stratum germinativum ( same as basale)

Question 3

5-10% of the basal layer has melanocytes

Answer 3

. F. 10-25%

Question 4

What types of cells are in the stratum basale

Answer 4

Melanosomes and keratinocytes

Question 5

Stratum spinosum also known as

Answer 5

Prickly

Question 6

Describe Stratum spinosum

Answer 6

Thick, weblike, prickly, keratinocytes

Question 7

What cells are in Stratum spinosum

Answer 7

Keratinocytes, melanosomes and dendrites

Question 8

Stratum granulosum described six to seven thick flattened layers

Answer 8

F. 4 to 6 thin,

Question 9

How does the flatness of Stratum granules contribute

Answer 9

Nuclei, organelles disintegrate

Question 10

Besides lamellar granules, how does Stratum granulosum prevent dehydration

Answer 10

water resistant glycolipids (lamellar granules)

Question 11

What is keratization in Stratum granulosum is when. Accumulating keratohyaline, forming keratin fibres in lower layer

Answer 11

F. in the upper layer

Question 12

Cells in stratum granulosum die from the dryness

Answer 12

F. They die beaucse they’re too far away from dermal capillaries

Question 13

Stratum lucidum describe and location

Answer 13

In thick skin, above granular

Two to three Thin, clear, flat, dead, keratinocytes

Question 14

Describe Stratum corneum. What cells are in it? What is it also called?

Answer 14

Horny. 20 to 30 layers, flattened,

dead keratinized cells

Question 15

Stratum corneum cells function

Answer 15

Protection (cells, abrasion, penetration, assaults)

preventing water loss,