The Integument-Test#2 Flashcards
What do the Osmotic Forces do?
Bath: Water enters body due to salt inside
Ocean: Pulls water out of body due to salt outside in ocean water.
Osmotic Flow?
Letting water pass through the filtering layer continuously. (google)
Epidermal Ridges
Increased Sensitivity
Finger Print: Genetically Determined
U.V Radiation Good Effects
Burns cholesterol
U.V. Radiation Problems
Wrinkling
Cancer
Chromosome Damage
Melanin
Inside Basale and U.V. radiation brings out color in skin.
U.V. Radiation (def)
Ultraviolet radiation, is a form of electromagnetic radiation.
Hair Follicle (2 parts)
Papilla and Matrix
Papilla
anchor made of nerves and vessels
Matrix
Area where hair is made
Mitosis makes soft keratin
matrix
The outer surface of the matrix contains…
cuticle= hard keratin
In the matrix hard keratin is formed where?
the outside of hair.
Cuticle (eponychium)
skin that hangs over the nail root
Vellus Hair
Peach fuzz
Terminal Hair
head
eyelashes
eyebrows
Intermediate Hair
Arm and leg hair
hormonal hair
Hair Growth/Day
1/3 mm per day
of lost hairs/day
Roughly 50 hairs a day
Hair Lifespan
2-5 years
Sebaceous Glands
secrete waxy substance (sebum) onto hair follicle.
prevents infection
Sweat Glands (3)
Apocrine Variety
Merocrine
Eccrine
Apocrine variety
- Armpits, grain
- secretion (sweat) smelly
- Human sense of smell deadened to this important odor
- animal sense moods basis of smell
Merocrine
Secrete directly to skin
99% water
(sweat glands)
