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Host Defence > Skin, Hair and Nails > Flashcards

Skin, Hair and Nails Flashcards

1
Q

What is the integumentary system?

A

Skin, hair, glands producing oil and sweat, nails and sensory receptors

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2
Q

What are the functions of the integumentary system?

A

Thermoregulation, stores blood, protection, detect cutaneous sensation, excretion and absorption and vit D synthesis

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3
Q

What are the layers of the skin?

A

Epidermis, dermis, subcutaneous layer (inner most)

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4
Q

What is the epidermis?

A

keratinised stratified squamous epithelium, 5 layers CLGSB

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5
Q

What are the 4 cell types of the epidermis?

A

Keratinocytes, melanocytes, langerhans cells, merkel cells

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6
Q

Keratinocyte function

A

Produce keratin and lamellar granules

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7
Q

Melanocyte function

A

Produce melanin pigment, susceptible to UV damage

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8
Q

Langerhan function

A

Macrophages, immune response, easily damaged by UV

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9
Q

Merkel cell function

A

Tactile, deep, detect touch sensation

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10
Q

What are the layers of the epidermis

A

Corneum
Lucidum
Granulosum
Spinosum
Bassale

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11
Q

Features of the dermis

A

Dense, irregular CT, collagen and elastin for tensile strength, blood vessels

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12
Q

What are the 2 regions of the dermis?

A

Papillary region (thin) and reticular (thicker)

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13
Q

What aspects of the skin are important in immunity?

A

Keratin-protects from microbes
Melanin-protect from UV
Macrophages-intraepidermal and dermal
Sebum-oily with bactericidal chemicals

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14
Q

What is striae more commonly known as?

A

Stretch marks

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15
Q

What forms finger prints?

A

Epidermal ridges

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16
Q

What 3 pigments determine skin colour?

A

Melanin, Hb and carotene

17
Q

What is albinism?

A

Genetic condition with the inability to produce melanin

18
Q

What is albinism?

A

Genetic condition with the inability to produce melanin

19
Q

What is vitiligo?

A

Partial or complete loss of melanocytes on patches of skin

20
Q

What is jaundice?

A

Build up of bilirubin

21
Q

What is the structure of hair?

A

Hair shaft, root, (follicle around root, bulb at base of follicle), arrector pili muscle and sebaceous gland

22
Q

What hair type do babies have?

A

Lanugo

23
Q

Where is terminal hair?

A

Eyebrows, eyelashes, scalp

24
Q

Where is vellus hair?

A

Puberty spaces

25
Q

What is dark hair rich in?

A

Eumelanin

26
Q

What is blond/red hair rich in?

A

Pheomelanin variants

27
Q

What are 5 layers of nails?

A

Free edge, nail body, lunula, eponychium and nail root

Host Defence (22 decks)

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