Necessary Life Functions

MMR MER DG

maintain boundaries

internal vs external boundaries

movement

locomotion, movement of substances

responsiveness

respond to changes + send responses to changes

Digestive

break down + absorb

Metabolism

chem reactions in body, make energy regulate horomones, break down molecules into small, build small into big

Excretion

eliminate waste from metabolic reaction, waste removal in urine, feces

Reproduction

happens on cellular level or organism level, makes generations

Growth

increase cell size and number of cells

Survival Needs

water, 37 degrees c stable body temp, atmospheric pressure for gas exchange

Homeostasis

stable internal balance—> body function —> life

Homeostatic Imbalance

when disease, body will fix —> balance

Negative Feedback

response goes in opposite direction of change

body temp up, sweat to decrease

Positive Feedback

response in the same direction,

blood clotting: intitial clotting signals cause more clotting signals to built clot fast