Skin

Question 1

the skin has 3 layers…

Answer 1

hypodermis
dermis
epidermis

Question 2

Strata

Answer 2

the layers of the skin

Question 3

stratum basale

Answer 3

contains stem cells and is responsible for the proliferation of keratinocytes - cells of the skin that produce keratin.

Question 4

stratum spinosum

Answer 4

where the cells become connected to each other

langerhans cells

Question 5

stratum granulosym

Answer 5

where keratinocytes die and lose their nuclei

Question 6

stratum lucidum

Answer 6

present in thick, hairless skin such as skin in the sole of the foot or the palms and are transparent

Question 7

stratum cornereum

Answer 7

contains up to several dozen layers of flattened keratinocytes, forming a barrier that prevent invasion by pathogens and that helps to prevent loss of fluids and sa;t.

Question 8

calluses

Answer 8

form from excessive keratin deposition in areas of repeated strain due to friction; they provide protection to avoid damage in the future.

Question 9

meanocyutes

Answer 9

cell type derived from neural crest cells and four din the stratum basal.
product melanin (protect skin from DNA damage)

Question 10

Langerhans cells

Answer 10

special macrophages that reside within stratum spinosum.

antigen presenting cells

Question 11

dermis

Answer 11

has multiple of layers
papillary layer
reticular layer
have Sensory cells: Merkel cells (discs), meissner’s corpuscles, ruffini engines, and pacinian corpuscles

Question 12

hypodermis

Answer 12

layer that has the