Integumentary System

Question 1

What are the 2 main sections of the skin

Answer 1

Dermis and epidermis

Question 2

What is the epidermis

Answer 2

Top part exposed to external environment; made of stratified squamous epithelia and functions to protect from abrasions

Question 3

What is the dermis

Answer 3

Below epidermis, connective tissue, supports and protects skin and deeper layers also assists in thermoregulation and sensation

Question 4

Thick skin

Answer 4

5 layers or epidermis, no hair or oil glands, found in areas where there is more friction and pressure

Question 5

Thin skin

Answer 5

Has 4 layers or less of epidermis, can have hair and oil glands

Question 6

Dermal papillae

Answer 6

Papillae = bumps, dermis has ridges to increase surface area to attach dermis to epidermis

Question 7

Hypodermis

Answer 7

Pulls underlying tissue and Holds skin in place, fascia = sheet or wide band of CT

Question 8

Keratinocytes

Answer 8

Produced at lowest layer of upper dermis and move towards the surface, as they move up they fill with keratin and die

Question 9

Melanocytes

Answer 9

Produce melanin to make skin color

Question 10

Tactile cells

Answer 10

Sensory receptors for light touch; respond to light touch

Question 11

Stratum basale

Answer 11

Bottom layer, Produces new skin cells and pigmentation

Question 12

Stratum spinosum (layer 2/5)

Answer 12

Cells produce pre-keratin filament proteins, several cell layers thick
Layer 2/5

Question 13

Stratum Granulosum

Answer 13

Prevents water loss through skin, makes granules of keratohyalin which is part of keratin
Layer 3/5

Question 14

Stratum lucidum

Answer 14

Reduce friction between the stratum corneum and stratum granulosum
only found in THICK skin
Cells are dead

Question 15

Stratum corneum

Answer 15

Superficial layer, multiple layers of keratinized cells, cells shred from this layer