Integumentary Lecture

Question 1

The superficial region is the

Answer 1

Epidermis

Question 2

The middle region is the

Answer 2

Dermis

Question 3

The deepest region is the

Answer 3

Hypodermis

Question 4

What produces fibrous protein keratin?

Answer 4

Keratinocytes

Question 5

What Produces pigment melanin?

Answer 5

Melanocytes

Question 6

Epidermal dendritic (Langerhans) cells—macrophages help activate?

Answer 6

the immune system

Question 7

Tactile (Merkel) cells are

Answer 7

touch receptors

Question 8

Name the Stratum from the Epidermis:

• Is the deepest layer also called Stratum Germinativum
• Consists of cuboidal or columnar epithelial cells
• Cells undergo mitosis to replaceold or lost skin cells every 19-20Days
• Creates a barrier between the Epidermis and Dermis

Answer 8

Stratum Basale in the Epidermis

Question 9

Name the Stratum from the Epidermis:

• Known as the prickly layer
• Cells are bound by desmosomeswhich support the epidermis
• Some mitosis of cells occurs here
• Contains melanin granules and dendritic cells

Answer 9

Stratum Spinosum in the Epidermis

Question 10

Name the Stratum from the Epidermis:

• Cells change from cuboidal epithelium to squamous
• Epithelium (3-5 cell layers thick)
• Cells fill with keratin
• Produce lipids for waterproofing the skin
• Apoptosis occurs here(programmed cell death)

Answer 10

Stratum Granulosum in the Epidermis

Question 11

Name the Stratum from the Epidermis:

• -Known as the clear layer
• Found only in thick skin
• Is a clear layer of dead cells(keratinocytes)
• Found in Palms and Soles of the feet.

Answer 11

Stratum Lucidum in the Epidermis

Question 12

Name the Stratum from the Epidermis:

• Dead cells containing keratin whichgives this layer its structural strengthand protection
• Dead cells are surrounded by lipids which prevent fluid loss.
• Consists of multiple layers (20-30) of overlapping cells for protection
• Gradually lost off the surface

Answer 12

Stratum Corneum in the Epidermis