biol 227 Lab 4 Study Questions with
Complete Solutions
Functions of the skin - ANS insulates and cushions, protects, prevents water loss, regulates body
temperature, excretes wastes, vitamin d synthesis and senses organs
The two layers of skin are the ___ and ___. - ANS epidermis and dermis
What is the hypodermis? - ANS A layer of adipose (fat) tissue that stores energy and cushions
other organs
Layers of the epidermis (superficial to deep) - ANS stratum corneum, stratum lucidum, stratum
granulosum, stratum spinosum, stratum basale
what are the layers of the dermis? - ANS papillary layer and reticular layer
characteristics of the skin - ANS The integument covers the entire body and is the largest organ
Composed of the epidermis and dermis
waterproof, protective and adaptive
Where do fingerprints originate? - ANS papillary layer
What do Keratinocytes do? - ANS They produce keratin (hard protein that protects the skin).
accessory structures - ANS hair, nails, glands
hair root - ANS The part of the hair located below the surface of the epidermis.
, hair shaft - ANS visible part of the hair
hair follicle - ANS sac within which each hair grows
arrector pili muscle - ANS The small, involuntary muscle in the base of the hair follicle.
root hair plexus - ANS detect hair movement
Sudorifeous glands - ANS sweat glands that regulate body temperature
sebaceous glands - ANS oil glands
Skin temperature regulation when cold - ANS dermal arterioles constrict-less blood to skin
surface-retain heat
skin temperature regulation when hot - ANS dermal arterioles dilate-more blood to skin
surface-dissipates heat
Mechanoreceptors - ANS respond to touch, pressure, vibration, stretch, and itch
Thermoreceptors - ANS respond to changes in temperature
Nociceptors - ANS pain receptors
free nerve endings - ANS respond to pain and temperature
tactical discs - ANS light touch
Complete Solutions
Functions of the skin - ANS insulates and cushions, protects, prevents water loss, regulates body
temperature, excretes wastes, vitamin d synthesis and senses organs
The two layers of skin are the ___ and ___. - ANS epidermis and dermis
What is the hypodermis? - ANS A layer of adipose (fat) tissue that stores energy and cushions
other organs
Layers of the epidermis (superficial to deep) - ANS stratum corneum, stratum lucidum, stratum
granulosum, stratum spinosum, stratum basale
what are the layers of the dermis? - ANS papillary layer and reticular layer
characteristics of the skin - ANS The integument covers the entire body and is the largest organ
Composed of the epidermis and dermis
waterproof, protective and adaptive
Where do fingerprints originate? - ANS papillary layer
What do Keratinocytes do? - ANS They produce keratin (hard protein that protects the skin).
accessory structures - ANS hair, nails, glands
hair root - ANS The part of the hair located below the surface of the epidermis.
, hair shaft - ANS visible part of the hair
hair follicle - ANS sac within which each hair grows
arrector pili muscle - ANS The small, involuntary muscle in the base of the hair follicle.
root hair plexus - ANS detect hair movement
Sudorifeous glands - ANS sweat glands that regulate body temperature
sebaceous glands - ANS oil glands
Skin temperature regulation when cold - ANS dermal arterioles constrict-less blood to skin
surface-retain heat
skin temperature regulation when hot - ANS dermal arterioles dilate-more blood to skin
surface-dissipates heat
Mechanoreceptors - ANS respond to touch, pressure, vibration, stretch, and itch
Thermoreceptors - ANS respond to changes in temperature
Nociceptors - ANS pain receptors
free nerve endings - ANS respond to pain and temperature
tactical discs - ANS light touch
