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Musculoskeletal Block > L21-The Integumentary system - Skin [2013.10.25] > Flashcards

L21-The Integumentary system - Skin [2013.10.25] Flashcards

1
Q

How many layers are epidermis composed of?

A

Five layers

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2
Q

Name the layers of epidermis from the outermost to the innermost

A 
Stratum corneum 
Stratum lucidum 
Stratum granulosum 
Stratum spinosum 
Stratum basale
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3
Q

What part of epidermis is present in thick skin but not in thin skin?

A

Stratum lucidum

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4
Q

What type of cancer develops in stratum basale?

A

Basal cell carcinoma

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5
Q

What type of cancer develop in stratum spinosum?

A

Squamous cell carcinoma

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6
Q

Name the cell types present in the epidermis

A

Keratinocyte
Melanocyte
Langerhans cells
Merkel’s cell

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7
Q

Where is the melanocyte located in the epidermis?

A

Stratum basale

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8
Q

Where is the Langerhans cells located in the epidermis?

A

Found in all layers of epidermis but more on Stratum spinosum and BV in papillary dermis

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9
Q

Where are Merkel’s cell located in the epidermis?

A

Stratum basale

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10
Q

What is the raw materials used in melanine (brown pigment) production?

A

Tyrosine

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11
Q

What determine the colour of our skin?

A

The amount of melanine granules

Number of melanocytes are essentially the same in all races

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12
Q

What is the reason for hairs turning grey?

A

Reduction in number of melanocyte hence the amount of melanine granule produced

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13
Q

What is Vitiligo?

A

Patches of white area due to lack of melanocyte destroyed by the autoimmune response

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14
Q

What is the shape of the granule of Langerhans Cells?

A

Cigar shaped

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15
Q

What is the function of Merkel cell?

A

Touch receptor

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16
Q

Where is dermis derived from?

A

Mesoderm

17
Q

What type of collagen is dermis composed of?

A

Type 1

18
Q

What are the two layers of dermis?

A

Papillary layer

Reticular layer

19
Q

What are dermal ridges?

A

encapsulated nerve ending, Meissner’s corpuscles and capillary lope

20
Q

Name the sensation receptors found on the dermis layer.

A

Free nerve endings
Meissner’s corpuscles
Pacinian corpuscles

21
Q

Where are Meissner’s corpuscle found on our body?

A

Dermis of finger tips, soles, nipples, eyelids, lips and genitalia

22
Q

Where are Pacinian corpusules found on our body?

A

Hands and Foots

23
Q

What is the function of Sebaceous gland?

A

Secret sebum

24
Q

What is the characteristics of Stratum corneum in Sebacceous gland?

A

It dips into the sebacceous gland

25
Q

What are the two type of sweat glands?

A

Merocrine sweat gland and Apocrine sweat gland

26
Q

Describe the apocrine sweat gland secretion

A

Produce a viscid, milky secretion which becomes

malodorous

27
Q

What are ceruminous gland responsible for?

A

Cerumen, which protect the skin from desiccation or irritation

Musculoskeletal Block (5 decks)

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