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BIO 209 > Chapter 5 > Flashcards

Chapter 5 Flashcards

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Biology 101 flashcards
1
Q

Where can you find thick skin in the body?

A

plams, hands, feet

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2
Q

thick skin has____ layers

A

5

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3
Q

thin skin has____ layers

A

4

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4
Q

Name the 5 layers of the skin from deepest to most superfisal

A

1.basale
2.spinosum
3.granulosm
4.lucidum
5.cornum

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5
Q

which layer of the skin is NOT is not included in thin skin

A

strata lucidum

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6
Q

skin layers are also called____

A

strata

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7
Q

what is the deepest layer of skin

A

stratum basale

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8
Q

strata is attached to the _____

A

Dermis

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9
Q

what’s another name for stratum Basale

A

stratum germinativum

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10
Q

10-25% of the Basale cell is composed of what cell?

A

melanocytes

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11
Q

which layer has active mitosis

A

basal layer

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12
Q

what layer is also known as the prickly layer

A

strata spinosum

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13
Q

which layer of the epidermis is thick and alows them to resist tenison and pulling, due to pre-kertain and attached to desmosomes

A

strata spinsosum

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14
Q

what cells appear spikey in the epidermis.

A

stratum spinosum

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15
Q

what happens to the cells in the strata granulosm

A

cells flattend and start to die

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15
Q

what layer of skin have cells flattend

A

strataum granulosm

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16
Q

why do cells in the stratum granolusm start to die

A

too far away from capillaries

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17
Q

what does the stratum lucidum consist of

A

dead ketinocytes

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18
Q

which layer of the skin is the thickest

A

strata corneum

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19
Q

though dead, cells still function to
protect deeper cells from the ____
prevent ____ loss, and act as a _____ agnist biological, chemical, and physical assaults

A

environment, water, abrasion and penetration, barrier

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20
Q

What is apoptosis

A

cell death

21
Q

what does the dermis consist of

A

strong flexible connective tissue

22
Q

what does matrix contain

A

nerves, blood vessels and lymphatic vessels.

23
Q

What are the layers of the dermis

A

Papillary
reticular

24
Q

what layer has areolar connective tissue, collgen, elstaltic fibers and blood vessles

A

papillary layer

25
Q

what is the name of the superficial region of dermis that sends fingerlike projections into epidermis

A

dermal papillae

26
Q

epidermal ridges are also called ____

A

friction ridges

27
Q

what does the reticular layer consist of

A

coarse,dense fibrous connective tissue

28
Q

what is the network of blood vessels between reticular layer and hypo dermis

A

cutaneous plexus

29
Q

what are cleavage lines

A

collagen fibers running Parrell to skin surface

30
Q

What are flexture lines

A

dermal folds at or near joints

31
Q

what three pigments contribute to skin color

A

Melanin, cartone ,Hemogoblin

32
Q

what is the only pigment to be made in skin

A

melanin

33
Q

what are the 2 forms of mealinin

A

reddish yellow to brownish black

34
Q

what are skin color differnces due to

A

amount and form of melainin

35
Q

what is yellow to organge pigment and found in plams and soles

A

carotene

36
Q

what pigment comes from the strata corenum and hypodermis

A

carotene

37
Q

which pigment gives the pinkish hue

A

hemoglobin

38
Q

what is hemoglobin pink

A

lower levels of melanin

39
Q

what is cyanosis

A

blue skin color, low oxgenation levels of hemoglobin

40
Q

what is erythema

A

redness,fever, hypertension,inflamation, allgergy

41
Q

what is pallor

A

pale color, anemia, low blood presaure fear, anger

42
Q

what is juandice

A

yellow cast, liver disorder

43
Q

what is bronzing

A

steoriod hormones

44
Q

what are buruises

A

clotted blood beneath skin

45
Q

what is hair and what is the funtions

A

dead keratinzzied cells,
warn of insects on skin
hair on head protects against physical truma
protect from heat loss
shelid skin from sunlight

46
Q

What is hair and what does it contain

A

flexiable strands of dead keratinzied cells,
hard kertain

47
Q

what is the shaft and root of hair

A

shaft that extends above scalp where keratinztion is complete
root within scalp where keratinztion is still going on

48
Q

what are the 3 parts of the hair shaft

A

medulla, cortex,cuticle

49
Q

What is hair matrix

A

active dividing area of bulb that produces hair cells

50
Q

what is arrector pilli

A

small band of smooth muscle attached to follicle

51
Q

what is hair papilla

A

dermal tissue containing knot of capillaries that supplies nutrients

BIO 209 (3 decks)

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