chapter 5 Integumentary Flashcards

1
Q

the skin provides ? with chemical, physical and biological barriers from:

A

protection

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2
Q

skin provides protection from ?

A
 mechanical damage
 pathogens
 environmental toxins
 harmful UV radiation
 excessive water loss
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3
Q

regulation of body temperature through control of peripheral blood flow, sweating, and pilo-erection

A

thermoregulation

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4
Q

heat, cold, pain, and deep and light pressure receptors are abundant as cutaneous sensory receptors

A

sensation

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5
Q

vitamin D, when the skin is stimulated by sunlight

A

synthesis

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6
Q

incidental elimination of water, salts & urea through sweat secreted for temperature regulation

A

excretion

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7
Q

The skins consists of two major layers that are?

A

the deeper dermis (‘true skin’)

and the more superficial epidermis.

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8
Q

Below the skin is the subcutaneous layer known as ? and is technically not part of the skin but associated with it

A

hypodermis (superficial fascia loose connective tissue),

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9
Q

hypodermis consists of what kind of cell/tissue common in the subcutaneous layer and which functions to store excess food energy, cushion the body, and help to insulate the body against excessive heat loss.

A

adipose tissue

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10
Q

The dermis has two sub layers called

A

reticular layer and papillary layer

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11
Q

the deepest sub layer of the dermis that adheres to the subcutaneous layer and is thicker 80% of the dermis is called

A

reticular layer

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12
Q

reticular layer consists of what kind of tissue

A

dense irregular, connective tissue

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13
Q

what kind of glands are associated with the reticular layer?

A

sudoriferous glands and sebaceous glands.

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14
Q

this sublayer is adjacent to the epidermis and thinner

A

papillary

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15
Q

papillary layer consists of what kind of tissue

A

loose connective tissue

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16
Q

what kind of irregulatories are shown with the papillary layer?

A

(ridges and papillae) often are reflected as irregularities in the surface of the epidermis, above (e.g., finger prints and texture of skin).

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17
Q

is the outermost layer of the skin and Skin appendages are derivatives from the

A

epidermis

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18
Q

what kind of tissue is the epidermis and literally means “many layers of flattened cells.”

A

stratified squamous epithelium

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19
Q

the epidermis lacks what compared to the other layers?

A

lacks nerves endings and blood vessels, and the cells

in the outer sublayers are dead.

20
Q

how do the cells die in the epidermis?

A

cells die as they are pushed outward by mitotic cell division in
the deepest sublayer and the cell become further removed from blood capillaries in the dermis.

21
Q

The deepest to most superficial sublayers of the epidermis include: (5)

A
 Stratum basale
Stratum spinosum
Stratum granulosum
Stratum lucidum
Stratum corneum
22
Q

Deepest sublayer of the epidermis, which adheres to the basement membrane and papillary layer of the
dermis. also known as the bottom layer and is responsible for cell division and replacement?

A

Stratum basale

23
Q

what kind of cells are active in the stratum basale layer

A

mitotic cell division, due to the cells being pushed out from the epidermis

24
Q

melanocytes are present in which sublayer of the epidermis

A

stratum basale

25
Q

When exposed to sunlight, what is more active

in their production of the pigment called melanin.

A

melanocytes

26
Q

what shields the DNA of keratinocytes and provides protection against UV radiation

A

melanin

27
Q

epidermis sublayer that is Superficial to the stratum basale

A

Stratum spinosum

28
Q

stratum spinosum gets its name from the appearance of the cells on the microscope that look liks?

A

(shrinkage of cells, but with cell-tocell

attachment at desmosomes gives some of its cells a “spiny” appearance).

29
Q

A granular sublayer superficial to the stratum spinosum

A

Stratum granulosum

30
Q

what layer does keratinization process begin

A

Stratum granulosum

31
Q

A relatively clear (“lucid”) sublayer layer. Generally, only visible in the thicker parts of the
epidermis (palms of hands and fingers and plantar surface of foot).

A

Stratum lucidum

32
Q

sublayer that consists of Cornified cells, closely packed and flattened cells that are full of a protein called keratin

A

Stratum corneum

33
Q

Hair and nails (appendages of the skin) develop from what layer of skin

A

epidermis

34
Q

another name for sweat glands

A

Sudoriferous glands

35
Q

most common type of sweat gland, primary function is

evaporative cooling and thermoregulation that is part of the Sudoriferous glands

A

eccrine sweat glands

36
Q

sweat gland found in the axillary, anogenital and areolar region/anal that is part of the Sudoriferous glands

A

apocrine sweat glands

37
Q

modified apocrine sweat gland that produces cerumen (ear wax) that is part of the Sudoriferous glands

A

ceruminous glands

38
Q

gland produce milk that is part of the Sudoriferous glands

A

mammary glands

39
Q

another name for oil glands that is found throughout the body except the palms of the hands and soles of the feet

A

Sebaceous glands

40
Q

sebaceous glands produce ? which coats/lubricates skin and hair, helps keep skin moist, creates a water proof
barrier and inhibits bacterial growth

A

Sebum

41
Q

Explain why a superficial skin scrape (such as a paper cut) doesn’t bleed

A

The epidermis is nonvascularized. There are no blood vessels in this layer of the skin

42
Q

How do nutrients reach the epidermis of the skin?

A

Diffusion transports nutrients from blood vessels in the dermis into the epidermis.

43
Q

What stands hairs on end, causing piloerection?

A

arrector pili muscle

44
Q

The cuticle around a nail is the:

A

eponychium.

45
Q

Janet fell and skinned her knee. The scrape did not bleed. Damage must have only happened to the:

A

epidermis