Skin layers
The subcutaneous layer is made up of ________ tissue.
True or False:
Does everyone have different amounts of melanin?
if false state why
False
everyone has the same number, activation of melanocytes is what sets everyone apart.
What are the two types of nerves used to sense and react to stimuli?
sensory and motor
what is the technical term for the nails?
onyx
What layer of the epidermis is composed of cells that look like granules?
stratum granulosum
what are the 2 layers of the dermis called?
reticular and papillary
What carries the pigment granules that provides use color?
melanosomes
The hair follicles use __________ to help regulate body temperature and protect from heat loss.
arrector pili muscle
B-keratin
What layer of the epidermis forms your finger and foot prints?
stratum lucidum
In the stratum germinativum new cells are produced in a process known as __________.
mitosis
Bonus 100pts: State the colors each one produces
pheomelanin: red and yellow
eumelanin: dark brown to black
What are the 2 main things that the skin uses to protect itself from outside elements?
barrier function and melanin
What are the two types of nerves?
motor and sensory
desquamation
In the stratum spinosum _________ is the protein bonds that keeps the skin cells together
desmosomes
What enzyme that stimulates melanocytes and thus produces melanin
Tyrosinase
do your sweat glands help detox the body?
why or why not
No they do not, they help with preventing the body from overheating
your kidneys and liver do the detoxing
sebaceous gland are the largest on what two places on the body
the face and the scalp
what is the average cell turnover rate for a adult?
28 days
A __________ is composed of keratin and comprises about 95% of the epidermis
keratinocytes
What do we call products that suppress melanin production?
Extra 100pts: give an example
tyrosinase inhibitor
HQ
what substance that the skin produces helps prevent transepidermal water loss?
sebum
what are the two types of sweat glands?
bonus 100pts: describe what makes them different
apocrine and eccrine
apocrine - coiled, attached to follicles, found under arms and genital areas. has an oder
eccrine - all over the body, have a duct and a pore, no smell
When the keratinocytes reach the stratum corneum they harden and become ___________.
corneocytes