DPT712 PHYSIOLOGY INTEGUMENTARY EXAM QUESTIONS
AND ANSWERS VERIFIED BY EXPERT
Largest organ
skin 15-20% body mass
4 functions of integumentary system
protection, microbial defense, thermoregulation, sensory organs
3 layers of skin
epidermis, dermis, subcutaneous tissue
nonglabrous skin
hairy, most abundant, thermoregulation
glabrous skin
nonhairy, sensory receptors; hands and feet
epidermis function
protective barrier between internal and external environment
epidermis tissue type
avascular stratified squamos
epidermis renew rate
every 14 days
ectoderm
turns into nervous tissue or epidermis of skin
5 epidermal cell type
, multipotent, keratinocytes, melanocytes, langerhans, merkels
multipotent adult stem cells
constantly dividing
keratinocytes
have keratin which toughens the cells; keratin content increases as you most closer to
the top layer of skin
melanocytes
in epidermis; produce melanin that the keratinocytes take up
what stimulates melanin production
MSH and ACTH
langerhans cells
part of immune system
merkel cells
detect pressure and texture
effects of burns
increased water loss, disrupted fluid homeostasis, increased risk of infection
dermis is made up of
connective tissue
2 layers of dermis
papillary and reticular
papillary layer
loose/areolar CT, more superficial layer
reticular layer
AND ANSWERS VERIFIED BY EXPERT
Largest organ
skin 15-20% body mass
4 functions of integumentary system
protection, microbial defense, thermoregulation, sensory organs
3 layers of skin
epidermis, dermis, subcutaneous tissue
nonglabrous skin
hairy, most abundant, thermoregulation
glabrous skin
nonhairy, sensory receptors; hands and feet
epidermis function
protective barrier between internal and external environment
epidermis tissue type
avascular stratified squamos
epidermis renew rate
every 14 days
ectoderm
turns into nervous tissue or epidermis of skin
5 epidermal cell type
, multipotent, keratinocytes, melanocytes, langerhans, merkels
multipotent adult stem cells
constantly dividing
keratinocytes
have keratin which toughens the cells; keratin content increases as you most closer to
the top layer of skin
melanocytes
in epidermis; produce melanin that the keratinocytes take up
what stimulates melanin production
MSH and ACTH
langerhans cells
part of immune system
merkel cells
detect pressure and texture
effects of burns
increased water loss, disrupted fluid homeostasis, increased risk of infection
dermis is made up of
connective tissue
2 layers of dermis
papillary and reticular
papillary layer
loose/areolar CT, more superficial layer
reticular layer
