Exam 2 Spring

Question 1

epidermis

Answer 1

superficial (statum coreum –> basal)

thin

no bv

Question 2

layers of epidermis

Answer 2

corneum: horny

granulosum

spinosum

basalis

Question 3

cells of epidermis

Answer 3

keratinocytes: basal and squamous

melanocytes

langerhans

merkel

Question 4

fx of epidermis (5)

Answer 4

protection/barrier

maintain internal environement

thermoreg

communication

attractivness

Question 5

dermis

Answer 5

papillary and reticular dermis

lots of bv: superficial vascular plexus

CT: collagen, elastin

sebaceous glands

hair follicles

Question 6

fx of dermis (2)

Answer 6

nutrional and structural support

vasc

Question 7

subQ tissue composed of

Answer 7

fat

sweat glands

hair follicles

Question 8

subQ tissue fx (4)

Answer 8

thermoreg

nutrition

structure

sensation

Question 9

scarring occurs in what layer?

Answer 9

dermis

Question 10

disease state affects mainly what layer?

Answer 10

dermis

Question 11

skin appendages are… (4)

Answer 11

hair

nails

sebaceous glands

sweat glands

Question 12

components of skin appendages

Answer 12

epidermal: hair or sweat
dermal: growth and dev

dependant on interactions b/w early demris and epidermis

Question 13

hair

Answer 13

composed of:

• 85% anagen
• 14% telogen
• 1% catagen

grows: 0.4 mm/day
follicles: around 100,000 - 10% more in blondes, 10% less in redheads

Question 14

structure of hair

Answer 14

nonliving fibers

Question 15

lanugo

Answer 15

soft fine hair in fetus

usually shed before birth

Question 16

vellus

Answer 16

hair <1cm: short and unpig

Question 17

indeterminate scale hair

Answer 17

~1cm long

Question 18

temrinal scalp hair

Answer 18

>1cm

coarse and thick

pigmented

Question 19

what types of hairs are eyelashes and eyebrows?

Answer 19

terminal hairs

Question 20

sebaceous glands

Answer 20

everywhere but palms and soles

secrete protective fatty substance to skin via hair follicle

Question 21

types of sweat glands

Answer 21

eccrine:

• everywhere
• open directly on skin surf
• sweat: regulate body temp

apocrine:

• found in airpit and genitals: starts secreting at puberty
• open into hair follicles
• stim by emotional responses
• smell due to bacteria decomp

Question 22

structure of a nail

Answer 22

Question 23

skin changes with puberty

Answer 23

appearance of terminal hair

• boys: face, axilla, pubic
• girls: ax, pubic

incr in hair on trun and limbs

apocrine glands enlarge –> ax sweat –> body odor

Question 24

skin changes with age

Answer 24

intrinsic:

• lax
• decrease bv in dermis
• pale/opaque

extrinsic:

• environmental
• wrinkles
• deep furrowed thick yellow skin o back of hands
• thin fragile transparent depig patches on forearms

Question 25

skin findings of extrinsic aging

Answer 25

1. senile purpura: purple patches - well-demarcated (easy bruisinng)
2. senile legtiginne: borwn (liver) patches - backs of hands, forearms and face
   
   • does not fade
3. actinic keratosis: acne-looking –> rough yellow brown patches

Question 26

intrinsic aging

Answer 26

dry skin (asteatosis) - flaky, shiny, itchy - esp on legs

seborrheic keratosis: warty (barnacles) , greasy lesions on trunk, face, hands

Question 27

color changes in skin: brown

Answer 27

deposits of melanin:

• genetic
• melanin
• preg
• addi