12

Exposure to ____ stimulates melanocytes to increase production of melanin

builds up to help protect skin against UV radiation (tan)

is the skin reacting to UV exposure

fever, hypertension, inflammation, allergies, blushing

anemia or low blood pressure, feeling of fear and anger

liver disorder (yellow)

Addison’s disease (kidney disease)

broken blood vessels

Bluish or purple color skin

appendages of the skin

It releases secretion to the skin surface via ducts

2 groups of exocrine glands

found all over the skin except on the palms of the hands and the soles of the feet
No hair follicle

is a mixture of oily substances and fragmented cells

Lubricate skin that keep the skin soft and moist

prevent hair to becoming brittle
-contain chemicals that kills bacteria
-it become very active when
androgens(male sex hormones) are produced in increase amounts in both sexes during adolescence

when sebaceous gland ducts blocked by the sebum _____ appears on the skin.

active infection of the sebaceous glands

accumulated material oxidizes and dries,it darken

if the material did not dry

fast flowing sebum known as “cradle cap" in infants

Are widely distributed in the skin-2.5 million/person

2 types of sweat/sudoriferous glands

gland that produce sweat

a clear secretion primarily water plus salts(NaCl),vit.c,traces of metabolic waste(ammonia,urea,uric acid),lactic acid

sweat is acidic- inhibits the growth of certain bacteria

___ on a hot day, possible lose up

widely confined to the axillary(armpit) &in genital areas of the body
Secretion contains fatty acids and proteins
It may have a milky or yellowish color
Secretion is odorless but when bacteria that live on the skin use its proteins and fats as a source of nutrients,it can take a musky or unpleasant odor

it is an important part of our body image
-it found all over the body except on the palms of the hands,soles of the feet,nipples and lips

hair is found all over the body except

functions of hair