Chapter 5: Integumentary System

Question 1

Epidermis Structure

Answer 1

composed of stratified squamous epithelium

Question 2

Epidermis Function

Answer 2

protection against physical and microbial damage, Regulation of water loss, synthesis of Vitamin D

Question 3

Dermis Structure

Answer 3

Composed of connective tissue with blood vessels, nerves and accessary structures (hair follicles)

Question 4

Dermis Function

Answer 4

Providing strength and elasticity to the skin, housing sensory receptors and assisting in thermoregulation

Question 5

Epidermal Layers (From superficial to deep)

Answer 5

Stratum Corneum (Christmas)
Stratum Lucidium (lights)
Stratum Granulosum (glow)
Stratum Spinosum (super)
Stratum Basale (bright)

Question 6

Stratum Basale

Answer 6

Contains actively dividing keratinocytes

Question 7

Stratum Spinosum

Answer 7

Keratinocytes start to flatten and become connected by desmosomes

Question 8

Stratum Granulosum

Answer 8

Keratinocytes produce keratin and develop granules

Question 9

Stratum Lucidum

Answer 9

Present only in thick skin, like the palms and soles

Question 10

Stratum Corneum

Answer 10

Outermost layer with dead keratinized cells

Question 11

Dermal Layers

Answer 11

Papillary Layer & Reticular Layer

Question 12

Papillary Layer

Answer 12

Contains papillae that protect into the epidermis, forming ridges (fingerprints). Rich in blood vessels

Question 13

Reticular Layer

Answer 13

Deeper layer with collagen and elastic fibers for strength and elasticity. Also houses hair follicles, sweat glands, and sensory receptors

Question 14

Subcutaneous Layer (Hypodermis)

Answer 14

Composed of loose connective and adipose tissue. Secrete sweat that is primarily composed of water, electrolytes, and metabolic waste products.

Question 15

Apocrine Sweat Glands

Answer 15

Found mainly in the axillary and anogenital regions. Secrete thicker, milky sweat that contains proteins and fatty acids.

Question 16

Oil (sebaceous) Glands

Answer 16

Simple alveolar glands usually associated with hair follicles. Secret sebum that lubricated and waterproofs the skin and hair

Question 17

Eccrine Sweat Glands

Answer 17

Distributed throughout the body, especially on the palms, soles, and forehead. Secrete sweat that is primarily composed of water, electrolytes and metabolic waste products.