ESTI BOOK CH. 9 PHYSIOLOGY & HISTOLOGY OF THE SKIN

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physiology is:

STUDY OF THE INTERNAL WORKINGS OR FUNCTIONS OF LIVING ORGANISMS

largest organ of the body

SKIN

Appendages of the skin

HAIR, NAILS, SWEAT GLANDS AND OIL GLANDS

your skin contains what fraction of your body's primary immune cells

ONE-HALF

what does the skin protect against

OUTSIDE ELEMENTS AND MICROORGANISMS

the barrier function of the skin includes

ACID MANTLE

what is average pH of the acid mantle

4.5 - 5.5

what does TEWL stand for

TRANSEPIDERMAL WATER LOSS

the intercellular cement between epidermal cells is made up of, also protects cells from dehydration

LIPIDS

the immune cells that protect us from infection

T CELLS

sensory nerve fibers are most abundant in the

FINGERTIPS

The average bodys internal thermostat is set at___ degrees fahrenheit.

98.6

which glands excrete perspiration and detoxify the body?

SUDORIFEROUS

the sebaceous glands

SOFTEN THE SKIN, SECRETE OIL, AND PROTECT THE SKIN FROM OUTSIDE ELEMENTS

absorption occurs through which part of the skin?

CELLS, FOLLICLES, AND PORES

it is important to understand the function of each layer of the skin because it helps you to :

CORRECTLY CHOOSE PRODUCTS AND TREATMENTS

estheticians are licensed to work on ?

THE EPIDERMIS ONLY

about 95% of the epidermis is made up of :

KERATINOCYTES

describe the stratum lucidum

TRANSLUCENT LAYER THAT ALLOWS SUNLIGHT TO PASS THROUGH THE SKIN

How long does it take to replace skin cells?

28 DAYS

desquamation is the

SHEDDING OF THE SKIN CELLS IN THE OUTERMOST LAYERS OF THE STRATUM CORNEUM

Squamous cells are

FLAT CELLS

Clear, transparent layer of the epidermis under the stratum corneum.

STRATUM LUCIDUM

what part of the body is skin the thickest

PALM OF THE HAND

keratin and intercellular lipids are formed in the

STRATUM GRANULOSUM

which layer of the skin produces melanin

STRATUM GERMINATIVUM

The layer of the epidermis where mitosis occurs and cell division

STRATUM GERMINATIVUM

which cells in the basal layer produce pigment granules?

MELANOCYTES

the thick layer of the skin beneath the epidermis

DERMIS

what are the 2 layers of the dermis?

PAPILLARY AND RETICULAR

______ aid in the production of collagen and elasin

FIBROBLASTS

what layer connects the dermis to the epidermis called:

PAPILLARY

stretch marks are caused by

DAMAGED ELASTIN FIBERS

Loss of this causes aged skin to wrinkle & sag.

ELASTIN

subcutis or _______ tissue is found below the reticular layer

ADIPOSE

pertaining to the covering of the internal and external tissue of the body, this is not a layer of the skin

EPITHELIAL

if you have folliculitis, you have

AN INGROWN HAIR

which fibers stimulate the arrector pili muscles

MOTOR NERVES

differences to genetic skin color are due to

THE AMOUNT OF MELANIN ACTIVATED IN THE SKIN

products that suppress melanin production by interrupting biochemical processes are referred to as

EUMELANINS

apocrine glands are most active

DURING EMOTIONAL CHANGES

what do cells need in order to survive

NOURISHMENT, TO PROLIFERATE, AND PROTECTION

what stimulates cell turnover

ALPHAHYDROXY ACIDS

free radicals:

ARE SUPER OXIDIZERS, ATTACK CELL MEMBRANES, ATOMS OR MOLECULES WITH UNPAIRED ELECTRONS ARE CALLED

Have the greatest impact on skin aging.

UV RAYS

which of these is an indication of free radical damage.? pale skin, dry skin, tanned skin, or red inflammed skin.

RED, INFLAMED SKIN

also referred to as "burning rays" also the strongest rays to reach the earth's surface

UVB RAYS

people with which natural hair color are particularly susceptible to sun damage

RED

as estrogen depletes, skin begins to

LOSE IT'S TONE

estrogen used i hormone replacement therapy can come from

PLANTS OR ANIMALS

couperose veins can be caused by

ALIMENTARY PROBLEMS, HARSH COSMETICS, AND HEAT/COLD FLUCTUATIONS

what does hydro mean

water

the skin is composed of 2 parts:

epidermis & dermis

the skin is approximately _____ % water

50-70

the papillary layer connects the dermis to the epidermis. what is this junction called:

epidermal dermal junction

which substance is a slender outgrowth of the scalp

hair

HOW MANY CELLS DOES THE BODY REPLACE ON A DAILY BASIS

BILLIONS

ELASTIN & COLLAGEN ARE NOT EASILY _____ BY THE BODY

REPLACED

SKIN HAS NATURAL ANTIOXIDANTS TO PROTECT AGAINST SUN DAMAGE

TRUE

PREMATURE AGING SKIN CAN BE CAUSED BY

SMOKING, TANNING, AND CERTAIN DRUGS

sunscreens must be _____ in order to block both uva & uvb rays

broad spectrum

what role does estrogen play in protecting the skin

anti-inflammatory, tissue repair, and antioxidant

an esthetician's primary role is to

preserve, protect, and nourish the skin

the average adult has _____ square feet of skin, weighing ____ pounds

22, 8-10

the most amazing feature of the skin is its ability to

heal itself

what does skin absorb

oxygen

primary functions of the skin

protection, sensation, heat regulation, secretion, absorption, and excretion

fat insulates the body, keeping it

warm

where are the papillae located

bottom of the follicles

what are the most important functions of collagen

give skin strength & is necessary for wound healing

what is the function of elastin

forms elastic tissue

absorption of water and oxygen are

necessary for the skin's health

the spiny layer of the skin is called

stratum spinosum

basal cell layer is also known as

stratum germinativum

cell division is called

mitosis

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