Integumentary System Flashcards
Structural components of the epidermis
Keratinocytes, melanocytes, stem cells, cells with lipid rich granules, immortalized cells, cells connected by desmosomes
Structural components of the dermis
Folded layer, lower layer
Consist of collagen, elastin, blood vessels, nerves, hair follicles, glands, muscles, etc.
Structural components of the hypodermis
Adipose tissue, subcutaneous fat
Major function of sensation
Sensory receptors (nociceptors)
Major function of thermoregulation of the skin
Maintain homeostasis
Major function of protection of the skin
Barrier protection to water, microbes, trauma…
Major function of metabolism of the skin
Endocrine (vitamin D) and exocrine (sweat glands) functions
Age related skin changes
Visual: rough/dry, hangs loose, transparent, more fragile, bruising
Structural: decreased integrity, inflammatory response, immunologic response, impaired wound healing, increased risk of infection, cancer, sensitivity to allergens
Which layer of the skin contains stem cells responsible for keratinocytes and melanocytes?
Epidermis
Which of the following plays a key role in regulation in the formation of Vitamin D from UVB light?
Keratinocytes
Which of the following plays a key role in augmenting the body’s immune response against infection from microbes?
Microbiome of the skin
Which protein, located in the dermis, provides flexibility?
Elastin
Sebaceous glands produce what secretory product that empties into the hair follicle?
Sebum
What type of receptor responds to temperatures that can destroy tissues?
Thermal nociceptors
Blood vessels control what?
Thermoregulation
Blood flow regulated by the ANS
Vasoconstriction of blood vessels
Conserves body heat
Vasodilation
Transfer heat from body to the environment - heat loss
