Term
| What are the accessory skin structures? |
|
Definition
| sweat glands, sebaceous (oil) glands, hair, hair follicles |
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Term
| What are the 2 types of sweat glands? |
|
Definition
| Merocrine/Eccrine & Apocrine |
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|
Term
| What are the most common type of sweat glands? |
|
Definition
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Term
Where is the secretory portion of the gland located for merocrine/eccrine sweat gland?
Where is the releasing duct? |
|
Definition
coiled deeply within the dermis
-releasing duct extends to surface of epidermis |
|
|
Term
What do merocrine/eccrine glands secrete?
what takes place? |
|
Definition
sweat made of water and NaCl
-evaporative heat loss |
|
|
Term
What is the larger type of sweat gland?
where is the releasing duct? |
|
Definition
Apocrine
-opens into hair follicles (not surface of epidermis!) |
|
|
Term
| Where are apocrine sweat glands found? |
|
Definition
|
|
Term
What are secretions of the Apocrine sweat gland made of?
when are they active? |
|
Definition
organic substances
-not active until puberty |
|
|
Term
| What secretion is made of water and NaCl? |
|
Definition
| merocrine/eccrine sweat glands |
|
|
Term
What is the function of sebaceous glands?
what do they secrete? |
|
Definition
soften and lubricate hair and skin
-secrete sebum (oil) |
|
|
Term
| Where are sebaceous glands located? |
|
Definition
| everywhere except the palms of hands and soles of feet |
|
|
Term
what does hair consist of?
where are they located in regards to skin? |
|
Definition
the shaft and the root
-shaft is above the skin surface
-root is embedded in skin |
|
|
Term
|
Definition
-3 concentric (circular) layers of dead, keratinized epithelial cells
|
|
|
Term
| What are the layers of hair? |
|
Definition
medulla- central axis
cortex- bulk of the hair
cuticle- outermost layer |
|
|
Term
Where is the hair follicle?
What does the deep end of follicle do? |
|
Definition
-wraps around hair root
-deep end of follicle extends into hair bulb, which contains the matrix |
|
|
Term
| where is the hair matrix? |
|
Definition
within the hair bulb
-made of dividing epithelial cells that produce new hair |
|
|
Term
What are arrector pili?
location? |
|
Definition
smooth muscle cells that contract in response to cold temperatures or emotional distress
-each hair follicle has them
-pull follicle upright |
|
|
Term
| what stimulates arrector pili muscles in the hair follicle? |
|
Definition
| cold temperatures or emotional distress |
|
|
Term
|
Definition
| scale-like modifications of the epidermis |
|
|
Term
|
Definition
| proximal end of nail that is covered by skin |
|
|
Term
|
Definition
|
|
Term
|
Definition
| skin that covers the lateral ends of nail |
|
|
Term
|
Definition
| holds edges of nails in place |
|
|
Term
| What is the free edge of a nail? |
|
Definition
| portion of nail that extends past the fingertip |
|
|
Term
|
Definition
nail cuticle
-stratum corneum of the nail fold that has grown over the nail body |
|
|
Term
| What is the stratum corneum of the nail fold that has grown over nail body? |
|
Definition
|
|
Term
| What is the lunula of the nail? |
|
Definition
| crescent-shaped area above the cuticle |
|
|
Term
|
Definition
| made up by the deeper layers of the epidermis extending beneath the nail |
|
|
Term
|
Definition
| proximal portion of the nail bed & is responsible for nail growth |
|
|
Term
| What part of the nail is responsible for nail growth? |
|
Definition
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