Skin lecture 2 Flashcards
Accessory structures?
Hair
Sweat glands
Receptors
Nails
What does the hair accessory structure consist of?
Hair shaft
Hair follicle
Arrector pili muscle
sebaceous gland
What is acne? And how is the risk of acne increased?
Blockage of hair follicles and following infection. Increased sebum causes increase in risk of acne
Two types of sweat glands?
Eccrine
Apocrine
Features of eccrine sweat gland?
All over the body, essential for thermoregulation. Secrete a watery, electrolyte rich substance
What is sebum?
A natural moisturiser/ water repellent
Where is the highest production of sebum? And why?
On the face and shoulders because that is where rainfall is likely to occur.
Features of apocrine sweat glands?
They reside deeper in the skin and produce an oily substance into the base of a hair follicle
What is melanin and where is it produced?
Melanin is a pigment in the skin that absorbs UV light and protects cells from UV damage. it is produced in Melanocytes
How is melanin transferred to epidermal cells?
Melanosomes, vessels containing melanin
What is a mole? How are they caused?
Cluster of melanocytes. Overproliferation can be caused by sun exposure
What is a freckle?
Melanocytes overproducing melanosomes. Triggered by sun exposure
Where are melanocytes found in the skin?
Stratum Basale, so they are not shed
Where are melanosomes found?
Throughout the epidermis and can be shed
What is vitamin D essential for?
Normal calcium metabolism and strong bones. Can also affect mood
