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Bio 201 > Chapter 5, Integumentary system > Flashcards

Chapter 5, Integumentary system Flashcards

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Biology 101 flashcards
1
Q

Integument

A

Skin

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2
Q

What is the largest organ

A

Skin/Integument

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3
Q

What are the two layers in the Integument

A

Epidermis and Dermis

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4
Q

Subcutaneous layer

A

Not a part of the skin, under the dermis, made of adipose tissue

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5
Q

Integument Functions

A

Protects, Prevents water loss, Temperature regulation, Sensory, Secretion of wastes

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6
Q

Epidermis

A

At the top of the integument, avascular

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7
Q

What are the Epidermis layers

A

In order- Corneum, lucidum, granulosum, spinosum, and basale.

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8
Q

Stratum basale

A

1 layer of cells, Keratinocytes- Protects and waterproof the skin. Melanocytes- Produce melanin . Tactile cells- sensitive to touch.

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9
Q

Stratum spinosum

A

Several layers thick, Keratinocytes, Epidermal dendritic cells-helps fight infections.

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10
Q

Stratum Granulosum

A

3-5 layers of Keratinocytes

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11
Q

Stratum Lucidum

A

2-3 layers, thick skin, cells lack organelles

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12
Q

Stratum corneum

A

20-30 layers, Dead Keratinocytes.

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13
Q

Thin skin lacks what

A

The Stratum Lucidum

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14
Q

Hemoglobin

A

The pigment of blood, red

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15
Q

Melanin

A

Absorbs UV from the skin, turns skin brown/tan

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16
Q

Carotene

A

Yellow-Orange pigment found in skin from food buildup

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17
Q

Albinism

A

White hair, pale skin, pink iris. Lack of melanin

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18
Q

Bronzing

A

Skin is bronze color. Glucocorticoid hormone deficiency

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19
Q

Cyanosis

A

Blue skin from not enough oxygen regulation

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20
Q

Erythema

A

Skin is red. Excercise or sunburn

21
Q

Hematoma

A

A bruise on the skin. From a blow to the skin

22
Q

Jaundice

A

Skin and sclera (white of eyes) look yellow. Elevated levels of bilirubin

23
Q

Pallor

A

Skin appears ashy and pale. Decreased blood flow to skin

24
Q

Nevus

A

A mole

25
Q

Hemangioma

A

Blood vessels that form due to tumor

26
Q

Friction ridges

A

Folds of epidermis and dermis of fingers, palms, soles, and toes

27
Q

Dermis

A

The lowest layer of the integument, made of areolar and dense irregular CT. Papillary and Reticular layer.

28
Q

Reticular layer

A

Bundles of collagen fibers, blood vessels glands, hair follicles, and nerves.

29
Q

Nerves in the integument-

A

Control blood flow, touch receptors, control the glandular secretion

30
Q

the blood supply in integument-

A

Controls body temperature

31
Q

Vasoconstriction

A

Narrows blood vessels diameter

32
Q

Vasodilation

A

Widens blood vessels diameter

33
Q

Subcutaneous Layer

A

Not part of the integument, protects underlying structures, stores energy, thermal insulation.

34
Q

Structures from the epidermis

A

Nails, hair, Exocrine glands of the skin

35
Q

Nail Matrix

A

Thickened growing part of the nail bed

36
Q

Lunula

A

The white part of the nail, caused by the thickening underlying part of the stratum basale.

37
Q

Hair follicle

A

Surrounds each hair

38
Q

Arector pili

A

Responds to cold temperatures, contracts making the hair stand up known as “goosebumps”

39
Q

Hair bulb

A

Swelling of epithelial cells where the hair originates

40
Q

Hair root

A

portion deep to the skin surface, the middle layer

41
Q

Hair Shaft

A

The visible end of the hair

42
Q

Functions of hair

A

Protection of the scalp, sensory reception, chemical signal

43
Q

Exocrine glands of the skin

A

Sweat and sebaceous glands

44
Q

Sweat glands

A

produce watery solution

45
Q

Sebaceous glands

A

Produce oily secretions

46
Q

Merocrine Sweat glands

A

Release secretions into a duct through a pore on the surface of the skin

47
Q

Apocrine Sweat glands

A

Secretes a cloudy odor into the armpits, groin, nipple, and anus.

48
Q

Sebaceous gland

A

Creates oily sebum in hair

Bio 201 (4 decks)

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