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Anatomy & Physiology 101 > U2- Integumentary System > Flashcards

U2- Integumentary System Flashcards

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1
Q

functions

A

resistance to trama and infection
sensation
thermoreg.
nonverbal comm.

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2
Q

layers

A

epidermis
dermis
hypodermis

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3
Q

epidermis-cell types

A

keratinocytes

melanocytes

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4
Q

keratinocytes

A

synth. keratin

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5
Q

melanocytes

A

synth. pigment (melanin)

branch btw keratinocy. and shed fragments

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6
Q

epithelium layers (BSGLC)

A 
(deep to superficial)
basal
spinosum
granulosum
lucidium
corneum
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7
Q

basal layer

A

site for stem cell division (mature into keratinocytes)

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8
Q

spinosum layer

A

cells getter flatter towards surface

desmosomes bridge cells together

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9
Q

gransulosum layer

A

dark staining layer

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10
Q

lucidum layer

A

!!seen only in thick skin!!!!

no cell boundaries visible

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11
Q

corneum layer

A

surface layer

where dead, scaly keratinocytes flake off

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12
Q

keratinocyte cell cycle

A

regen faster if injured
cell originate in basal and push up
cell regen is slower w/ age

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13
Q

dermis

A

CT layer

houses nerves, glands, hair follicles and roots

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14
Q

zones of dermis

A

papillary and reticular

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15
Q

papillary zone

A

thin areolar CT towards surface

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16
Q

reticular zone

A

fibrous deep

17
Q

hypodermis

A

“subcutaneous tissue”
binds skin to underlying tissue
filled w/ adipose tissue

18
Q

hemoglobin

A

red pigment of blood

areas w/ capillaries closer to surface= mre red

19
Q

dark skin

A

greater amount of melanin
granules in k-ocytes spread out
melan. breaks down slower

20
Q

light skin

A

lesser amount of melanin
granules in k-ocytes concentrated near nucleus
melan. breaks down fast

21
Q

tactile cells

A

oval shaped

sensors for light touch sensation

22
Q

Messiner’s corpuscle

A

close to skin surface

transmit sensations of fine, discriminative touch and vibration

23
Q

Pacinian corpuscle

A

look like sperm, deep in dermis

detect pressure and high-frequency vibration

Anatomy & Physiology 101 (12 decks)

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