SKIN LAYERS
What is the deepest layer of the epidermis, responsible for cell renewal?
What is the stratum basale
Fully differentiated keratinocytes contain ___% of intermediate filaments.
85
1
1
Which nerve ending has pressure receptors?
Pacinian corpuscles
Which layer of the epidermis is also known as the prickle cell layer due to desmosome connections?
What is the stratum spinosum
Melanin is produced by the oxidation of …………
tyrosine.
2
2
What are the 4 regions of the hair follicles?
Infundibulum, isthmus, follicular bulge, inferior segments
This layer is only present in thick skin and appears as a thin, transparent band under the microscope.
What is the stratum lucidum?
hat is the function of filaggrin?
used as clinical marker for the final stage of apoptosis
3
3
What is the name of the hormone that activates the sebaceous gland?
Androgen
Which layer of the dermis contains type I collagen, forms Langer lines, and provides tensile strength to the skin?
What is the reticular layer?
Name the lipid molecule which is consisted in epidermal water barrier and triggers apoptosis.
ceramides
4
4
What are the 3 layers of the internal root sheath? what type of epithelial cells are there?
The process by which keratinocytes undergo a specialized form of apoptosis, losing their nucleus while retaining keratin, is known as what?
What is terminal differentiation?
For staining langerhans cells, besides gold chloride impregnation what do we use?
A: Antibody against CD1a molecules
5
5
What makes the hair shaft rigid?
high sulfur KAPs