What is NOT found in the dermis?

Blood vessels (cutaneous plexus)

Why does human skin color differ?

Type of melanin produced (red-yellow or brown-black)

They have different numbers of melanocytes

How do melanocytes & keratinocytes work together to protect the skin from UV damage?

Keratinocytes form a UV-blocking pigment layer from accumulated melanin

Keratinocytes provide melanocytes with nutrients

They are both responsible for protection

They are both responsible for pigment

How does the epidermis protect against water loss?

Lamellar granules in the stratum granulosum - secrete glycolipids into the extracellular space preventing water loss

The fat in the hypodermis acting as a barrier

The intermediate filaments providing a strengthening bond in the stratum spinosum

The dermal thickness does not allow water outside of the body

What is the function of the root hair plexus?

Allows the hair to assist in touch sensation

To make sure the muscles stay taut in the skin

To keep the hair rooted through the dermis

What is the main function of human hair?

Hair is not functional - it's aesthetic

The hair follicle wall is

In both the epidermal and dermal walls

In neither the epidermal and dermal walls

Why do humans not molt (shed all their hair at the same time)?

Hair follicles alternate between active and regressive cycles

Hair follicles are always active; hair never stops growing

Hair grows faster when it's warmer and slower when it's cooler

What is true of eccrine sweat glands?

Open to a pore on the skins surface

Play a major role in thermoregulation

99% water, sodium chloride, trace amounts of wastes

Secrete sweat that includes proteins and fatty substances, making it appear viscous with a milky or yellowish color

What is true of apocrine sweat glands?

Secretions are odorless until bacteria interacts with them

Found all over the body except axillary and anogenital areas

What are some characteristics of a third-degree burn?

Both epidermal and dermal damage

Appears gray-white, cherry red or black

Burns that cover 1/3 or more of the body

How do physicians estimate the extent of burn damage associated with fluid loss?

The amount of pain caused by the burn

What are some characteristics of melanoma?

Surgical excision and immunotherapy to treat

What are some characteristics of squamous cell carcinoma?

Surgical excision and radiation to treat

Scaly red papule mainly on the scalp, ear, lips, hands, etc.

Located in the keratinocytes of the stratum granulosum

Integumentary System Review

Authored by April Keim

Biology

12th Grade

NGSS covered

Used 31+ times

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45 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cells that function as sensory receptors for touch

Melanocytes

Dendritic cells

Keratinocytes

Tactile cells

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The most abundant cells of the epidermis

Melanocytes

Dendritic cells

Keratinocytes

Tactile cells

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cells that produce pigment and protect DNA from UV damage

Melanocytes

Dendritic cells

Keratinocytes

Tactile cells

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cells that act as skin macrophages

Melanocytes

Dendritic cells

Keratinocytes

Tactile cells

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The deepest epidermal layer that is a single row of actively mitotic cells and receives nutrients from dermal blood vessels

Stratum corneum

Stratum granulosum

Stratum spinosum

Stratum basale

The layer of the epidermis that is think, translucent, and only found in thick skin

Stratum corneum

Stratum lucidum

Stratum granulosum

Stratum spinosum

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The layer of the epidermis where keratinization begins and cells become more flat

Stratum corneum

Stratum granulosum

Stratum spinosum

Stratum basale

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Integumentary System Review

Cells that function as sensory receptors for touch

The most abundant cells of the epidermis

Cells that produce pigment and protect DNA from UV damage

Cells that act as skin macrophages

The deepest epidermal layer that is a single row of actively mitotic cells and receives nutrients from dermal blood vessels

The layer of the epidermis that is think, translucent, and only found in thick skin

The layer of the epidermis where keratinization begins and cells become more flat

This layer of the epidermis consists of 20-30 rows of flat, dead keratinized cells that serve as a protective barrier

This layer of the epidermis contains bundles of thick intermediate filaments made of pre-keratin

Skin color indicating a liver disorder

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