Skin Structure and Function 2 Flashcards
What are melanocytes?
Dendritic cells that produce pigment
What is the name of the organelle that produces pigment?
melanosomes
how is melanin formed
conversion of tyrosine to either eumelanin (brown or black) or phaemelanin (red or yellow)
What does melanin do
absorbs lights
what is vitligo
autoimmunie disease in which there is a loss of melanocytes
what is albinism
disorder in which there is a partial loss of pigment production
what is nelson’s syndrome
melanin stimulating hormone is produced in excess by the pituitary
Where are melanocytes found
from the basal cell layer up
what are langerhans cells
immune cells in the skin
antigen presenting
where are langerhans cells found
prickle cell layers in epidermis
dermis
lymph nodes
Where do they originiate
bone marrow
what are merkel cells
mechanoreceptors
where merkel cells found
basal layer between keratinocytes and nerve fibres
name the phases of growth of hair follicles
anagen( growing)
catagen (involuting)
telogen (rest)
