1
Q
The superficial region is the
A
Epidermis
2
Q
The middle region is the
A
Dermis
3
Q
The deepest region is the
A
Hypodermis
4
Q
What produces fibrous protein keratin?
A
Keratinocytes
5
Q
What Produces pigment melanin?
A
Melanocytes
6
Q
Epidermal dendritic (Langerhans) cells—macrophages help activate?
A
the immune system
7
Q
Tactile (Merkel) cells are
A
touch receptors
8
Q
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
A
Stratum Basale in the Epidermis
9
Q
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
A
Stratum Spinosum in the Epidermis
10
Q
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)
A
Stratum Granulosum in the Epidermis
11
Q
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.
A
Stratum Lucidum in the Epidermis
12
Q
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
A
Stratum Corneum in the Epidermis
