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BIO exam 1
Intro, Tissues and Skin
31
Biology
Undergraduate 4
09/04/2016

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Term
homeostasis
Definition
To maintain stable internal conditions regardless of what's changing outside the body.
Term
variable
Definition
all homeostatic control mechanisms involving at least 3 components that work together: receptors, control center and effectors
Term
receptors
Definition
a sensor that monitors the environment and responds to changes (stimuli) and sends info to the control center
Term
control center
Definition
determines the "set point" at which a variable is maintained. Analyzes input and determines the correct response
Term
effectors
Definition
gives the output response
Term
negative feedback
Definition
output shuts off the original effect or reduces it. The variable then goes in the opposite direction it was originally to return it to its "ideal" value
Term
positive feedback
Definition
response enhances the original stimulus so the response goes faster. The result processes in the same direction as the initial change .
Term
what is the front of the lower leg called?
Definition
crural
Term
what is the back of the lower leg called?
Definition
sural
Term
what are the sides of the lower leg called?
Definition
fibular
Term
what is the ankle called
Definition
tarsal
Term
what is the top of the foot called
Definition
metatarsal
Term
what is the heel called
Definition
calcaneal
Term
what is the bottom of the foot called
Definition
plantar
Term
what are the functions of epithelial tissue
Definition
protection, absorption, filtration excretion, secretion and sensory reception
Term
describe the apical surface
Definition
upper free surface, exposed to the body exterior, has micro villi that increases the surface area
Term
describe the basal surface
Definition
adhesive sheet containing glycoproteins, acts as a filter that determines which molecules are allowed in the epithelium
Term
what are tight juntions
Definition
bind adjacent cells to epithelium, helps to keep proteins in the apical region from diffusing into the basal region
Term
basement membrane
Definition
reinforces the epithelial sheet, helps resist stretching and tearing and defines the epithelial boundary
Term
where are simple squamous cells
Definition
kidneys, air sacs in lungs, lining of the heart & blood vessels, lymphatic vessels
Term
what is the function of simple squamous cells
Definition
allows materials to pass by diffusion and filtration, and secretes lubrication
Term
where are simple cuboidal cells
Definition
kidney tubules, small glands and ovary surface
Term
what is the function of simple cuboidal cell
Definition
secretion and absorption
Term
where are simple columnar cells
Definition
digestive tract, gallbladder, small bronchi and uterine tubes
Term
what is the function of simple columnar cells
Definition
absorption and secretion of mucus and ciliated cells propel the mucus
Term
where are pseudostratified columnar cells
Definition
trachea, and most of the upper respiratory tract
Term
what is the function of pseudostratified columnar cells
Definition
secretes but does not absorb mucus, and propels that mucus by cilia
Term
where is stratified squamous cells
Definition
non-keratinized areas: esophagus, mouth and vagina
Term
what is the function of stratified squamous cells
Definition
protects underlying tissues in areas subjected to abraison
Term
where are transitional cells
Definition
urinary area
Term
what is the function of transitional cells
Definition
to stretch when there is urine in the specific area
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