Essential dermatology
Which is not a function of the skin?
Immunosurveillance
Vitamin D synthesis
Air tight barrier
Protective barrier against environmental insults
Temperature regulation
Appearance/cosmesis
Sensation
How long does it take for the foetal skin to fully develop?
32 weeks
4 weeks
26 weeks
16 weeks
These lines show the development growth pattern of skin, what are they called?
Langer's lines
Axial lines
Dermatome lines
Blaschko’s lines
Layers of the epidermis: what is the blue layer?
Stratum basale
Stratum granulosum
Stratum spinosum
Stratum lucidum
Stratum corneum
Cells of the epidermis: Keratinocytes
Produce keratin as a protective barrier
Produce melanin, gives pigment to skin and protects nuclei from UV radiation DNA damage
Present antigens and activate T-lymphocytes for immune protection
Contain specialised nerve endings for sensation
Cells of the epidermis: Langerhan's cells
Produce keratin as a protective barrier
Produce melanin, gives pigment to skin and protects nuclei from UV radiation DNA damage
Present antigens and activate T-lymphocytes for immune protection
Contain specialised nerve endings for sensation
Cells of the epidermis: Melanocytes
Produce keratin as a protective barrier
Produce melanin, gives pigment to skin and protects nuclei from UV radiation DNA damage
Present antigens and activate T-lymphocytes for immune protection
Contain specialised nerve endings for sensation
Cells of the epidermis: Merkel cells
Produce keratin as a protective barrier
Produce melanin, gives pigment to skin and protects nuclei from UV radiation DNA damage
Present antigens and activate T-lymphocytes for immune protection
Contain specialised nerve endings for sensation
Lanugo hair
Fine long hair in fetus
Fine short hair on all body surfaces
Coarse long hair on scalp, eyebrows, eyelashes and pubic area
Vellus hair
Fine long hair in fetus
Fine short hair on all body surfaces
Coarse long hair on scalp, eyebrows, eyelashes and pubic area
Terminal hair
Fine long hair in fetus
Fine short hair on all body surfaces
Coarse long hair on scalp, eyebrows, eyelashes and pubic area
Phases of hair growth: what is the second phase?
Telogen
Anagen
Catagen
Nails: nail plate arises from?
Nail bed
Root of nail
Nail matrix
Proximal nail fold
Sebaceous glands are stimulated by the conversion of?
Deoxycortisol to cortisol
Androgens to dihydrotestosterone
Pregnenolone to progesterone
Estrone to Estradiol
Eccrine glands
Found in the axillae, areolae, genitalia and anus.
Universally distributed in the skin
Apocrine glands
Found in the axillae, areolae, genitalia and anus.
Universally distributed in the skin
Foetal origin of the: epidermis?
The mesoderm
The ectoderm, periderm layer formed
The neural crest
Foetal origin of the: dermis ?
The mesoderm
The ectoderm, periderm layer formed
The neural crest
Foetal origin of the: melanocytes?
The mesoderm
The ectoderm, periderm layer formed
The neural crest
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