CH7: Review Questions

Question 1

What are the three layers of the skin?

Answer 1

Epidermis, Dermis, Hypodermis

Question 2

What is the most numerous cell of the epidermis

Answer 2

keratinocyte

Question 3

What are the two primary layers of the dermis and what are they made of?

Answer 3

papillary - areolar connective tissue

reticular - dense irregular connective tissue

Question 4

What are the four protective functions of the skin?

Answer 4

UV protection, reduces water loss, regulates body temp, protects from infection

Question 5

What are the 4 types of cells in the epidermis?

Answer 5

keratinocytes - protein,

melanocytes - melanin protects from UV,

dendritic cells - immune response,

tactile cells - sensitive touch receptors

Question 6

What tissue is the epidermis composed of ?

Answer 6

stratified squamous epithelial

Question 7

What are the five layers of the epidermis?

Answer 7

stratum corneum - 20-30 dead flattened (keratin present)

stratum lucidum - dead and only in thick skin (two layers)

stratum granulosum - 4-6 layers dead (prevents water loss and numerous granules)

stratum spinosum - several layers thick (pre-keratin filaments)

stratum basale - mitotically active (rapid cell division) (melanocytes and tactile)

Question 8

List the sensory receptors found in the dermis of the skin

Answer 8

free nerve endings ( pain/temp)

tactile corpuscles (touch in hairless skin)

lamellar corpuscles (pressure)

Question 9

What are hair and nails comprised of?

Answer 9

dead/keratinized cells

Question 10

What are cutaneous receptors

Answer 10

specialized nerve endings that respond to temp, touch, etc..

Question 11

What structures are related to hair:

Answer 11

hair shaft