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Botany > Block 3 - Integument > Flashcards

Block 3 - Integument Flashcards

1
Q

part of skin that is keratinized cornified stratified squamous epithelium

A

epidermis

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2
Q

epidermis cells are called blank

A

keratinocytes

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3
Q

layer of collagenous connective tissue under skin

A

dermis

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4
Q

thick or thin skin refers to thickness of the blank

A

epidermis

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5
Q

these are most numerous in thick skin and doesnt have hair or sebaceous gland

A

sweat glands

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6
Q

not an official layer of skin and contains superficial fatty fascia

A

hypodermis

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7
Q

in thin skin, all blank strata are thinner especially blank

A

epidermal, stratum corneum

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8
Q

layer of epidermis that has a single layer of cuboidal or columnar cells

A

stratum basale

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9
Q

stratum basale has many blank between adjacent cells and blank between cell and basal lamina

A

desmosomes, hemidesmosomes

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10
Q

stratum basale has blank filaments and a blank cytoplasm

A

intermediate, basophilic

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11
Q

layer of epidermis when cells pull apart except at desmosomes, and there are increased intermediate filaments

A

stratum spinosum

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12
Q

layer layer of epidermis that contains two types of granules including keratohyalin, lamellar or membrane coating

A

stratum granulosum

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13
Q

basophilic granules rich in protein, no membrane, not exported, filaments pass through them

A

keratohyalin

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14
Q

granules seen only under EM, have membrane, are exocytosed, make lipid coating for keratinocytes

A

lamellar (membrane coating)

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15
Q

layer of epidermis that is thin white and unstained, densely packed keratin filaments, thick plasmalemma, identifiable only in thick skin

A

stratum lucidum

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16
Q

stratum lucidum is identical to blank

A

stratum corneum

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17
Q

layer of epidermis that is keratinized flat “cells”, for wear and tear, cytoplasmic sacs filled with keratin filaments in an amorphous matrix

A

stratum corneum

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18
Q

three non keratinocytes in epidermis

A

melanocytes, langerhans cells, merkel cells

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19
Q

melanocytes come from what embryo origin

A

neural crest cells

20
Q

melanocytes resist staining and are under this layer

A

stratum basale

21
Q

this is produced by ribosomes, transported in rough er to golgi, and incorporated into melanosomes

A

tyrosinase

22
Q

blank is converted into melanin

A

tyrosine

23
Q

antigen presenting cells from marrow and are phagocytes

A

langerhans

24
Q

langerhans cells travel lymphatics to lymph node and give info to activate a blank

A

t lymphocyte

25
Q

dendritic cells present in basal layer that are mechanoreceptors for touch

A

merkel

26
Q

merkel cells have desmosomes that connect to blank

A

keratinocytes

27
Q

two layers of dermis

A

papillary, reticular

28
Q

layer of dermis immediately under epidermis and forms these projections that interdigitate with epidermal ridges (pegs)

A

papillary

29
Q

layer of dermis that is thick bundels of dense irregular ct, running in all directions

A

reticular

30
Q

invagination of epidermis into dermis/hypodermis, ends as a bulb in ct

A

hair follicle

31
Q

three layers of hair follicle that undergo cornificiation

A

outer root sheath, inner root sheath, hair shaft

32
Q

blank dissolves and disappears at level of sebaceous gland

A

inner root sheath

33
Q

outgrowth of outer root sheath with several acini

A

sebaceous gland

34
Q

sebaceous gland drains into blank

A

upper hair follicle

35
Q

mode of sebaceous gland secretion

A

holosecretion via hair or directly onto skin in the form of sebum

36
Q

mass of cells attached to hair follicle just below sebaceous gland duct

A

hair bulge

37
Q

even if bald, blank persist but blank are not present

A

hair follicles, hair shaft

38
Q

smooth muscle bundle from ct of hair follicle below sebaceous gland to papillary level of dermis

A

arrector pili muscle

39
Q

goose bumps are caused by blank

A

arrector pili muscle

40
Q

sweat glands found over most of the body and not associated with hair follicles

A

merocrine

41
Q

cells that surround secretory part of merocrine sweat glands

A

myoepithelial

42
Q

sweat glands that drain into hair follicles located in axilla, pubic, perineal, scrotal

A

apocrine

43
Q

apocrine glands are blank than merocrine (eccrine)

A

larger

44
Q

secretion of apocrine glands is odorless but this causes the odor

A

bacterial decomposition

45
Q

skin is involved in blank synthesis with uv light which is produced by blank

A

vitamin 3, keratinocytes

46
Q

Hair is only attached here

A

Bottom

47
Q

Hair bulge contains blank

A

Stem cells

Botany (26 decks)

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