Integumentary System

Question 1

Anatomy

Answer 1

Epidermis
Dermis
Hypodermis

Question 2

Nails

Answer 2

Protect from injury & infections, grasping & manipulating objects

Location: toes & fingers (epidermis)

Question 3

Sweat glands

Answer 3

Eccrine sweat glands: protects skin, thermorégulation, excretion of water

Location: everywhere on body, except border of lips, nail beds (dermis)

Apocrine sweat glands: scent glands (pheromone secretion)

Location: axillary regions (armpits), perineal regions (groin)
(Dermis)

Question 4

Sebaceous glands

Answer 4

Secrete sebum, lubricates & protects skin

Location: everyone on body, except palms of hands & soles of feet
Epidermis

Question 5

Hair follicles

Answer 5

Anchors hair to skin & grow more hair

Location: head, pubic region, underarms, beard (terminal hair) dermis
Throughout body (vellus hair) dermis

Question 6

Thick skin vs thin skin

Answer 6

Hairless vs hair

Soles of feet, palms of hands, surface of fingers & toes vs. Everywhere else on body

Dermis thinner vs. dermis thicker

Epidermis thicker vs. Epidermis thinner

No skin appendages (except eccrine glands) vs. All diff appendages

Question 7

Temperature Regulation in Humans

Answer 7

1) hypo. Diff in internal temp

2) signals through nervous system to makes necessary changes

Question 8

Temperature rises

Answer 8

1) Hypo to sweat glands, produce sweat; And to blood vessels dilate (vasodilation)

2) swear draw out heat with evaporation
- increase surface area of blood, energy drawn out of blood into env.

Question 9

Temperature decreases

Answer 9

1) blood vessels constrict (vasoconstriction)

2) blood vessels out of contact with skin
Prevents heat loss , shivering
Muscle contractions, goosebumps
Hair stands up, insulator to maintain body heat

Question 10

Diseases

Answer 10

Skin cancer
Eczema
Alopecia

Question 11

Skin cancer

Answer 11

Uncontrolled growth of skin cells

Causes:
Exposure to UV light

Symptoms: ABCDE rule

Asymmetry of mole

Border of mole uneven or blurred

Colour changes or varies throughout mole

Diameter of mole greater than 6mm

Evolution of mole over time (indicator of melanoma)

Question 12

Eczema

Answer 12

Autoimmune disease: skin red & itchy

Causes:
Genetics
Environment
Stress

Symptoms:
Red spots
Itching
Dry, cracked, swollen skin

Question 13

Alopecia

Answer 13

Autoimmune disease: hair loss

Causes:
Genetics
Stress
Hormonal changes

Symptoms: hair loss