science Flashcards
(24 cards)
what is homeostasis?
the process by
which an organism’s internal environment
is kept stable in spite of change in the
external environment
what is dynamic Equilibrium?
a state of balance in
nonliving, physical systems
what is the skeletal function for?
shape & support
→ move (locomotion)
→ protect organs
→ produce blood cells
→ store minerals
what is veritable column?
backbone
what is a vertebrate?
disc-like small bones separated
by cartilage
what is a joint?
two bones come together
what is a ligament?
tissue holding joints together;
bone to bone
what is a cartagile?
cushion
what is involuntary muscles?
Involuntary Muscles: not under conscious
control; example: heart beat, breathing,
digesting food
what is voluntary muscles?
under conscious
control; example: facial expressions, walking
what is striated?
muscle with lines
what is non striated?
muscles without lines
what is the skin function?
Covers and protects from injury, infection,
water loss
Regulates body temperature
Removes waste (perspiration)
Collects environmental information
Produces Vitamin D
what does Skin consists of?
epidermis – outer layer
dermis – inner layer
how do you keep your health goof for skin?
diet
keep clean and dry
limit sun exposure
what is Digestive System Functions?
- breakdown food into nutrient
molecules - absorption of nutrient molecules
what is absorption?
nutrient molecules pass through wall of
small intestine into bloodstream
what is digestion?
breakdown food into nutrient
molecules.
Liver Function:
breaks down medicine and alcohol
(poisons, toxins)
removes nitrogen
produces bile
Bile:
stored in gallbladder (below liver);
like a “dish detergent” . . . physically
breaks down large fat particles into small
fat particles.
Pancreas Function:
produces enzymes which
enter small intestine and chemically breaks down
fats, proteins and complex carbohydrates (starch).
Large Intestine Functions:
→ contains good bacteria that produces Vitamin K
(clots blood)
→ removes water from undigested food which
enters the bloodstream by absorption.
Rectum:
stores undigested solid waste
