Lecture 2 Flashcards
accessory structures of the skin?
- hair
- sweat glands
- receptors
- nails
the arrector pili muscles associated with the hair follicle does what?
contraction produces goose bumps, which improves circulation
the root hair plexus associated with hair does what?
collection of sensory nerves at the base of each hair follicle, heightened sensation
the sebaceous glands associated with hair does what?
produce oily secretion called sebum, which naturally moisturises the skin and nourishes hair shaft, also water repellent
what are the two types of swear glands?
eccrine and apocrine
where are eccrine sweat glands found?
most areas of the skin
where are apocrine sweat glands found?
specific areas e.g armpit, groin and around the nipples
what do eccrine swear glands produce and how?
pour watery secretions directly onto the skin surface
what do apocrine swear glands produce and how?
secrete sticky/oily and sometimes odorous secretions onto the base of the hair follicle
what are the eccrine sweat glands important for?
thermoregulation and excretion, some antibacterial action
what are the apocrine sweat glands influenced by?
hormones
e.g lactation
functions of nails
- protect fingertips/toes
- enhance sensation
- sensory receptors require deformation
what happens when the skin ages ?
- thinner epidermis
- thinner dermis = sagging and wrinkling due to reduced collagen
- slower skin repair
- drier epidermis = less sebum
- impaired cooling = less sweat
what does melanin pigment do?
absorbs UV light which protects the cells from UV damage
where is melanin produced
melanocytes
