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Biol235 Quiz 1 > Chapter 5 > Flashcards

Chapter 5 Flashcards

1
Q

What tissue is epidermis made of

A

Keratinized stratified squamous

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2
Q

Cells in epidermis

A

Keratinocytes
Melanocytes
Intraepidermal macrophages
Tactile epithelial cells

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3
Q

Keratinocytes

A

Produce keratin/lamellar granules (releases water repellent sealant desires water entry/loss foreign particle entry)

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4
Q

Melanocytes

A

Produce melanin
Form veil over keratinocytes nucleus to protect from UV

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5
Q

Intraepidermal Macrophages/langerhen cells

A

Help immune system recognize/destroy invading microbes

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6
Q

Tactile epithelial cells (Merkel cells)

A

Contact tactile/merkel discs detect touch sensations

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7
Q

Thin skin layer

A

Basum, spinosum, granulosum, thin corneum

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8
Q

Thick skin layers

A

Basum, spinsosum, granulosom, lucidum, thick corneum

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9
Q

Stratum basale

A

Deepest layer, single row cuboidal/columnar keratinocytes, stem cells, tactile discs/cells

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10
Q

Stratum spinosum

A

8-10 layers of keratinocytes Desosomes keratin intermediate filaments, Intraepidermal macrophages, melanocytes

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11
Q

Stratum granulosum

A

Keratinocytes undergo apoptosis
Keratohylin
Lamellar granules

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12
Q

Stratum lucidum

A

Thick skin 4-6 layers dead keratinocytes

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13
Q

Stratum corneum

A

Few to 50 (25-30) layers desd keratinocytes
No nuclei/organelles

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14
Q

What tissue is dermis made of

A

Dense irregular connective tissue

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15
Q

Regions of dermis

A

Papillary
Reticular

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16
Q

Papillary

A

1/5
Collagen/fine elastic fibers
Dermal papillae increase SA

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17
Q

Free nerve vending

A

Dendrites lacking structural specialization

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18
Q

Reticular region

A

4/5 thickness
Thick collagen/elastic fibers scattered fibroblast wandering called
Collagen Fibers arranges netlike=resist stretching
BV, nerves, hair follicles sebaceous sudoriferous

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19
Q

Basis for skin colour

A

Melanin
Hemoglobin
Carotene

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20
Q

Hair shaft

A

Superficial portion

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21
Q

Hair root

A

Deep portion penetrates dermis sometimes subcutaneous
Medulla cortex cuticle

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22
Q

Medulla

A

Inner portion
Pigment cells

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23
Q

Cortex

A

Middle portion
Elongated cells

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24
Q

Cuticle of hair

A

Outermost later
Heavily Keratinized

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25
Q

Hair follicle

A

Surrounds root
Epithelial root sheath

26
Q

Epithelial root sheath

A

External
Internal

27
Q

External roots sheath

A

Downward continuation of dermis

28
Q

Internal root sheath

A

Procured by matrix

29
Q

Dermal root sheath

A

Dense dermis surrounding hair follicle

30
Q

Hair bulb

A

Base of hair follicle and dermal root sheath

31
Q

Papilla

A

Nipple shaped BV Areolar connective tissue

32
Q

Hair matrix

A

Germinal layer of cells responsible for hair growth

33
Q

Arrector pili

A

Muscle on hair goosebumps

34
Q

Sebaceous glands

A

Lips penis labia less on trunks/limbs

Excrete onto dermis

Mostly connected to hair follicle

Secretes sebum

Prevent hair dryness water loss skin rough inhibit growth of bacteria

Activated in puberty

35
Q

Sudiferous glands types

A

Eccrine
Apocrine

36
Q

Eccrine

A

Mostly forehead palms soles

Deep dermis

Surface of epidermis

Perspiration

Body temp/waste removal emotional stress

Soon after birth

37
Q

Apocrine

A

Axillae groin Areolae labia bearer regions

Deep dermis/subcutaneous

Hair follicles

Perspiration

Emotional/sexual stress

Puberty

38
Q

Ceremonious

A

External auditory canal

Subcutaneous

Surface of canal/sebaceous ducts

Cerumen

Stop entrance of foreign particles/waterproof

Soon after birth

39
Q

Nail body

A

Visible portion

40
Q

Free edge

A

Extend past distal end of digit

41
Q

Nail root

A

Under layer of skin

42
Q

Lunula

A

White crescent shape can’t see vascular tissue

43
Q

Hypnychium

A

Join free edge and fingertip

44
Q

Nail bed

A

Below nail

45
Q

Eponychium

A

Cuticle consists of stratum corneum

46
Q

Nail matrix

A

Epithelium proximal to nail root

47
Q

Thin vs thick skin

A

Thin: not on palms/soles
.1-.15mm
No lucidum
No epidermal ridges
Has hair follicles
Has sebaceous glands
Less sudiferous
Less sensory receptors

Thick
Only palms/soles
.6-4.5mm
Has lucidum
Has epidermal ridges
No hair follicles
No sebaceous
More sudiferous
More touch receptors

48
Q

Thermoregulation with skin

A

Sweat=lower body temp
Dilate BV=lower body temp

49
Q

Blood reservoir of skin

A

Intense network holding 8-10% of blood

50
Q

Protection with skin

A

Keratin
Lamented granules
Sebaceous
Sudoriferous
Melanin
Intraepidermal macrophages

51
Q

Sensation with ski

A

Cutaneous sensation: tactile/thermal/pain
Tactile discs corpuscles of touch hair root plexus’s

52
Q

How much water skin secretes

A

400ml daily

53
Q

Skin abosorb

A

Water certain lipid soluble vitamins, drugs, gases

54
Q

Vitamin D synthesis with skin

A

Activation of precursor molecule by UV (10-15 mins 2/week)
Enzymes in liver/kidney modify activated molecule
Produce calcitriol

55
Q

Epidermis, dermis, subcutaneous tissues

A

Epithelial
Connective
Areolar/adipose

56
Q

Cutaneous membrane

57
Q

Extensibility

A

Ability to stretch

58
Q

Elasticity

A

Ability to return to normal after stretching

59
Q

Epidermal ridges

A

Downward projection of epidermis into dermis between dermal papillae

Strong bond
Increase SA=sensitive
Increase friction=grip

60
Q

Thermoregulatory sweating

A

First in forhead/scalp

Insensible: evaporates before seen
Sensible: evaporates after seen

61
Q

Emotional sweating

A

First palms/soles

Biol235 Quiz 1 (5 decks)

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