The Intergumentary system Flashcards
What does the epidermis consist of?
Epithelia cells that are constantly worn away and regenerated via division of stem cells.
Give the second layer of skin
Dermis
What is contained within the dermis?
Many blood vessels and nerve endings as well as hair follicles and exocrine glands.
Give the functions of the intergumentary system.
Protection
Vitamin D synthesis
Cutaneous sensation
Excretion
What is regulation of body temperature controlled by?
Hypothalamus
Where are peripheral temperature receptors located?
In the skin and they also monitor external temperature.
Give the role of the sweat glands
To release sweat when body temperature rises
Give the role of the arterioles
Supplying the capillaries near the surface can constrict or dilate
Give the role of shivering
Reflex action involving small and rapid contractions of skeletal muscles and this processes body heat so therefore the body temperature increases.
When does vasodilation occur?
When the core body temperature rises and the nerve impulses from the hypothalamus causes the muscles inside the walls of the arterioles in the dermis to relax.
When does vasoconstriction occur?
Core body temp falls and nerve impulses from hypothalamus causes contraction of the muscles in the wall of the same arteriole.
When do the hair erector muscles raise on our bodies?
When the core body temperature falls and therefore nerve impulses are sent to the hair erector muscles so heat loss is reduced.
What is atopic eczema?
Condition where the skin becomes dry, itchy, inflamed and cracked. It is a chronic condition
What does the word ‘atopic’ mean?
Sensitivity of allergens due to a overproduction of immunoglobin.
What can trigger atopic eczema?
Soaps, detergents, stress and weather.
