chapter 6, integumentary sys Flashcards

1
Q
A
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2
Q

What is the outer layer of the skin called?

A

Epidermis – Outer layer of the skin, composed of stratified squamous epithelium.

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3
Q

What is the inner layer of the skin called?

A

Dermis – Inner layer of the skin, containing connective tissue, blood vessels, and nerve endings.

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4
Q

What is the layer beneath the dermis called?

A

Hypodermis (Subcutaneous tissue) – Layer beneath the dermis, consisting of adipose and connective tissue.

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5
Q

What are the most abundant epidermal cells?

A

Keratinocytes – The most abundant epidermal cells, responsible for producing keratin.

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6
Q

What do melanocytes produce?

A

Melanocytes – Cells in the stratum basale that produce melanin, which determines skin color.

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7
Q

What are dendritic (Langerhans) cells?

A

Dendritic (Langerhans) cells – Immune cells in the epidermis that help detect pathogens.

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8
Q

What are tactile (Merkel) cells?

A

Tactile (Merkel) cells – Sensory receptors for touch.

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9
Q

What are stem cells in the epidermis?

A

Stem cells – Undifferentiated cells in the stratum basale that produce new keratinocytes.

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10
Q

What is the deepest layer of the epidermis?

A

Stratum basale – Deepest layer, where new skin cells are generated.

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11
Q

What characterizes the stratum spinosum?

A

Stratum spinosum – Several layers of keratinocytes, connected by desmosomes.

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12
Q

What happens in the stratum granulosum?

A

Stratum granulosum – Layer where keratinocytes begin to die and release waterproofing substances.

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13
Q

Where is the stratum lucidum found?

A

Stratum lucidum – Thin, transparent layer found only in thick skin (palms, soles).

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14
Q

What is the outer layer of dead cells called?

A

Stratum corneum – Outer layer of dead keratinized cells, providing a tough, protective barrier.

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15
Q

What pigment is responsible for skin color?

A

Melanin – Pigment produced by melanocytes, responsible for skin color.

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16
Q

What is eumelanin?

A

Eumelanin – Dark brown/black pigment.

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17
Q

What is pheomelanin?

A

Pheomelanin – Reddish-yellow pigment.

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18
Q

What is carotene?

A

Carotene – Yellow-orange pigment found in some foods that can influence skin tone.

19
Q

What role does hemoglobin play in skin color?

A

Hemoglobin – Oxygen-binding protein in red blood cells that contributes to skin color.

20
Q

What is thermoregulation?

A

Thermoregulation – Regulation of body temperature via sweat glands and blood flow.

21
Q

What is the protective function of the skin?

A

Protection – Barrier against pathogens, UV radiation, and water loss.

22
Q

What sensory functions does the skin have?

A

Sensation – Nerve endings in the skin detect touch, temperature, and pain.

23
Q

How does the skin contribute to vitamin D synthesis?

A

Vitamin D Synthesis – Skin helps produce vitamin D when exposed to UV light.

24
Q

What is erythema?

A

Erythema – Redness of the skin due to increased blood flow.

25
What is cyanosis?
Cyanosis – Bluish tint due to lack of oxygen in the blood.
26
What causes jaundice?
Jaundice – Yellowing of the skin caused by liver dysfunction.
27
What is pallor?
Pallor – Pale skin due to reduced blood flow or anemia.
28
What is albinism?
Albinism – Genetic condition causing a lack of melanin production.
29
What do sebaceous glands produce?
Sebaceous (Oil) Glands – Produce sebum (oil) to lubricate the skin and hair.
30
What is the function of sudoriferous glands?
Sudoriferous (Sweat) Glands – Produce sweat for thermoregulation.
31
What are eccrine glands?
Eccrine (Merocrine) Glands – Most common, found all over the body, secrete watery sweat.
32
Where are apocrine glands found?
Apocrine Glands – Found in armpits and groin, secrete thicker sweat that can produce odor.
33
What do ceruminous glands produce?
Ceruminous Glands – Found in the ear canal, produce earwax (cerumen).
34
What are mammary glands?
Mammary Glands – Modified sweat glands that produce milk.
35
What is hair made of?
Hair (Pilus) – Made of keratinized cells, grows from hair follicles.
36
What is a hair follicle?
Hair follicle – Structure that houses the hair root and is connected to sebaceous glands.
37
What is the function of the arrector pili muscle?
Arrector pili muscle – Tiny muscle that causes hair to stand up (goosebumps).
38
What are nails?
Nails – Hard keratinized structures that protect the fingers and toes.
39
What is regeneration in wound healing?
Regeneration – Healing process where damaged tissue is replaced with the same type of cells.
40
What is fibrosis?
Fibrosis – Healing process where scar tissue forms instead of original tissue.
41
What characterizes a first-degree burn?
First-degree burn – Affects only the epidermis (redness, pain, no blisters).
42
What characterizes a second-degree burn?
Second-degree burn – Affects the epidermis and part of the dermis (blisters, pain).
43
What characterizes a third-degree burn?
Third-degree burn – Affects the epidermis, dermis, and sometimes deeper tissue (may not be painful due to nerve damage).
44
What is the Rule of Nines?
Rule of Nines – Method to estimate body surface area affected by burns.