Skin: 1 Flashcards

1
Q

3 layers of skin

A

Epiderme
Derme
Hypoderme

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1
Q

True or False,

The epiderme is a layer that it not vascularized or innervated

A

FASLE
Not Vascularized BUT INNERVATED

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2
Q

What is the difference between peau eppaise vs mince?

A

Couche epiderme de la cornee is thicker in eppaise

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3
Q

Cells of the epiderme

A

Kératinocytes
Melanocytes
cellules de Langerhans
Cellules de merkel

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4
Q

Which layer is this associated with?

Synthèse de cytokératine (ou tonofilaments) et des kératinosomes (corps lamellaires, lipides hydrophobes)

A

Couche Epineuse

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5
Q

What are melanocytes and where are they found?

A

Couche Basale de l’epiderme

Synthesize melanin that will be stocked in melanosomes that is slowly migrated towards neighbor keratinocytes

Function → Protect skin from UV light

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6
Q

What are merkel cells and where are they found?

A

Couche Basale

mécanorécepteurs: sensation tactile à adaptation lente.

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7
Q

What makes up the “couche epineuse”, what is particular?

A

La couche épineuse est formée de plusieurs couches de Kératinocytes

cellules sont également attachées par un nombre plus grand de
desmosomes, ce qui leur donne une allure épineuse

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8
Q

Cells of Langerhans, location and role?

A

Found in couche epineuse
assurent la surveillance immunitaire de la peau (cellules présentatrices d’antigènes CPA).

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9
Q

What is Granule de Birbeck?

A

Organites en forme de raquette de tennis (Granule de Birbeck),
spécifiques aux cellules de Langerhans

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10
Q

Vitamin D Synthesis, where it occurs and what is the product?

A

synthèse de la vitamine D3 commence au niveau de l’épiderme (couches basale et épineuse) sous l’effet de l’exposition aux rayons ultraviolets du soleil

This is an inactive not final form of Vitamin D (exam q)

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11
Q

2 Layers of the derme and their property

A

The derme is filled with
glands, fibroblastes, les macrophages, les
mastocytes
richement vascularisé et innervé

Il est constitué de 2 parties:
Le derme papillaire (TC lâche)
Le derme réticulaire (TC dense; fibres collagen I + elastique)

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12
Q

Difference between Les glandes sudoripares eccrines et apocrines?

A

Eccrine: Open at the surface

Apocrine: At the hair bulb

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13
Q

Where do hair follicles come from?

A

Le follicule pileux dérive d’une invagination de l’épiderme, avec
ses quatre types cellulaires, dans le derme gaines épithéliales

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14
Q

What is Muscle Arrecteur?

A

A thermoregulation muscle, erects the hair follicle in cold temperatures

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15
Q

What is the layer from which the nail will grow?

A

A partire de la matrice

16
Q

What are the plexus of the hypoderme and derme?

A

plexus sous-cutané : hypoderme
plexus cutané: jonction hypoderme/derme
plexus sous-papillaire: jonction dermo/épidermique

17
Q

Le réseau ________________ va donner naissance à un gros réseau capillaire qui va se mettre au niveau des papilles dermiques pour donner le réseau des ________________.

A

sous-papillaire
capillaires papillaires du epiderme

18
Q

2 types of afferent innervation?

A

Terminaisons nerveuses libres
Dans une capsule

19
Q

Meissner vs Merkel vs Pacini

A

Meissner: corpuscule, mechanoreceptor adaptation rapide,Papille dermique
Pacini: corpuscule, mechanoreceptor adaptation rapide, hypoderme
Merkel: libre,mechanoreceptor adaptation lente, epiderme