The Skinny of It
Hair, Nails, and Glands
Misc.
100
What epidermis layer is found mostly in the thick skin of the palm and soles?
Stratum lucidum
100
What is the innermost layer of hair?
Medulla
100
What is the deepest layer of the epidermis?
Stratum basale
200
What is destroyed in a second-degree burn?
The epidermis and some of the dermis
200
What is the upper portion of the fingernail matrix?
Lunula
200
Where are blood vessels NOT found in the skin?
Epidermis
300
What are the epidermal ridges responsible for?
Your fingerprints
300
What is the hair cuticle?
A single layer of cells around the shaft and root that contain hard keratin
300
What do the sebaceous glands do?
secretes oil (called sebum) which softens and conditions the hair and the skin
400
Which type of melanin is dark? Reddish?
Eumelanin - dark pigment
Pheomelanin - red tint pigment
400
What is the hair matrix?
A mass of undifferentiated cells from which the hair grows
400
What is squamous cell carcinoma?
The uncontrolled mitosis of cells in the stratum spinosum
500
What gives people different skin colors?
Melanocytes are cells that produce a pigment called melanin (two types). They send the pigment out into the skin via vesicles from exocytosis. This pigment is "eaten" by cells in the skin (which gives it its color). Everyone has the same amount of melanocytes, but not melanin.
500
What is the difference between merocrine and apocrine sweat glands?
Merocrine sweat glands - produce sweat and release it to the surface of the skin
Apocrine sweat glands - produce a strong odor, usually empty sweat into a hair follicle
500
With the skin, what happens when you cut parallel to lines of tension? Across the lines?
Cutting parallel - not much stress, and the wound can heal without scarring
Cutting across - lots of collagen fibers cut, and the wound will probably heal with a scar
600
Draw skin with epidermis, dermis, hypodermis, nerves, sweat gland, sweat pore, hair follicle, sebaceous gland, and arrector pili muscle.
600
Draw hair with medulla, cortex, cuticle, dermal root sheath, matrix, blood vessel, dermal papillae, internal epithelial root sheath, and external epithelial root sheath.
