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3/4 VET HEALTH > 2.Integumentary system > Flashcards

2.Integumentary system Flashcards

1
Q

Identify 3 layers of skin

A

epidermis, dermis and subcutaneous (hypodermis)

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2
Q

Describe epidermis

A

-most superficial layer
-no blood vessels or nerve endings
-melanocytes found
-no hair

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3
Q

Describe dermis

A

contains blood vessels, sensory nerves, sweat glands & ducts, sebaceous gland, hair and arrestor pili muscle

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4
Q

Describe subcutaneous layer

A

continuous layer of tissue (adipose and areolar)

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5
Q

Function of subcutaneous layer

A

insulate, store energy and shock absorb

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6
Q

Outline vitamin D production

A

skin exposed to UV light
UV light reacts with enzymes
pre vitamin D forms which is rearranged into vitamin D

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7
Q

Identify functions of integumentary system

A

Protection
Absorption
Sensation
Temperature regulation
Excretion
Vitamin D formation

(PASTED)

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8
Q

How does integumentary system carry out ‘Protection’

A

intact barrier prevents against invasion by pathogens, UV, mild trauma and chemicals

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9
Q

How does integumentary system carry out ‘Absorption’

A

limits absorption of drugs and toxic chemicals eg Mercury

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10
Q

How does integumentary system carry out ‘Sensation’

A

-nerve endings in the dermis are sensitive to stimuli eg nocioreceptors

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11
Q

How does integumentary system carry out ‘Temp regulation’

A

regulates body temp via vasodilation and constriction/sweat glands and piloerection

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12
Q

describe vasodilation

A

Increase diameter of blood vessels, increase blood flow increased heat loss by radiation

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13
Q

describe vasoconstriction

A

Decreased diameter of blood vessels, decreased blood flow decreased heat loss by radiation

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14
Q

How do sweat glands regulate body temperature

A

Sweat released onto skin surface, increased heat loss by evaporation

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15
Q

How does piloerection regulate body temp

A

Erector pili muscle cause the erection of hairs, trapping air molecules on the surface of the skin, creating insulating barrier and decreasing heat loss by radiation

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16
Q

piloerection /

A

goosebumps

17
Q

How does integumentary system carry out ‘Excretion’

A

Sodium chloride, sweat, urea and garlic can be excreted via skin

18
Q

Sudoriferous glands =

A

sweat glands

19
Q

Apocrine means

A

open to hair follicle

20
Q

Eccrine means

A

open to skin

21
Q

what are arrector pili muscle

A

smooth muscle fibers

22
Q

Identify functions of hair

A

regulate body temp
protect eg against sun/trap pathogens eg nasal hairs
provide sensory information

23
Q

Describe structure of hair

A

keratin filaments with a root and shaft attached to arrestor pili muscle

24
Q

How does hair have a protective function

A

against sunburn, debris, dust and foreign particles eg eyelashes, scalp, nose

25
Q

How does hair provide sensory information

A

hairs in vestibular system of inner ear detects head movements re:position and balance

26
Q

structure of nails

A

hard keratin plates that protect tips of fingers & toes

27
Q

3 parts of nail are

A

eponychium
hyponychium
perionychium

28
Q

Outline functions of nail

A

-serves as protective plates to help prevent scraping/cutting of fingers in envy activities
-enhance sensation

29
Q

What are sebaceous glands

A

-attach to hair and secrete sebum

30
Q

Contrast two types of sweat glands

A

Eccrine-most numerous/smaller/water and NaCl
Apocrine-armpits,scrotum,anus,labia/odour

31
Q

Function of sebaceous glands

A

secrete oil/SEBUM
-keeps hair soft and pliable
-acts as anti fungal and antibacterial
-lubricates skin/maintains hydration of skin

32
Q

what are ducts and pores

A

ducts are the pathway for sebum whereas pore is the opening to skin

33
Q
A
34
Q
A

3/4 VET HEALTH (22 decks)

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