Integumentary Flashcards
What does the integumentary system include?
sebaceous glands
sweat glands
hair
nails
Which vitamin does the skin manufacture?
Vitamin D
Layers of the skin from outer to inner
Epidermis
Dermis
Subcutaneous
The epidermis consist entirely of ___ ___.
epithelial cells; does NOT contain blood vessels
The deepest layer of the epidermis is the ___ ___.
stratum basale
What is stratum basale?
single layer of cells that continually undergo division
What is keratin?
A waxy protein that helps to waterproof the skin
The dermis consist mostly of ___ ___.
connective tissue
also contains blood vessels, sensory receptors, hair follicles, sebaceous glands and sweat glands. elastin and collagen fibers
Subcutanuous layer aka hypodermis consist of ___ ___.
connective tissue
binds to underlying muscle
Is the subcutaneous layer an “actual” layer of skin?
No.
What is thermoregulation?
body maintains a stable body temperature as one component of a stable internal environment
Temperature regulation is controlled by which feedback mechanism?
Negative - consist of a receptor, control center, and effector
Where are receptors located?
dermis of the skin
Where is the control center located?
hypothalamus
Where are effectors located?
sweat glands (evaporation of sweat) blood vessels (vasodilation) muscles (shivering)
Exocrine glands found in the skin.
sweat and sebaceous glands
Sebaceous glands are aka ___ glands.
holocrine
Sebum is an oily mixture of ___ and ___.
lipids, proteins
Sweat glands are either ___ glands or ___ glands.
eccrine, apocrine
Eccrine glands are not connected to hair follicles. T or F.
True
What actives eccrine glands?
elevated body temperature
Where are eccrine glands found?
forehead
neck
back
What does eccrine glands secrete?
salty solution of electrolytes and water with sodium chloride, K, bicarb, glucose, and antimicrobial peptides
What do apocrine glands secrete?
an oily solution containing fatty acid, triglycerides, and proteins
Where are apocrine glands located?
armpits
groins
palms
soles of feet
What activates apocrine glands?
stress or anxiety
