Unit 2 Concept 2

No ATP High to low concentration (Down concentration)

ATP Low to high concentration

Amount of solute dissolved in a solvent

Difference in concentration of a substance from one location to the other

Spreading out of molecules till equilibrium is reached O2 CO2

Movement with the help of a transport protein Large molecules like glucose And polar molecules

Simple diffusion of water molecules High to low

Low water concentration

High water concentration

Water is lower than the cells cytoplasm Shrivels

Water is higher than the cells cytoplasm Swells

Identical water and cytoplasm

Output intensifies the response Ex.human birth-fruit ripening

Output causes a counter response to return to a set point Ex. Human temp- blood sugar

Change in the environment

A change in the organism

need of an organism to stay Stable by regulating internal conditions

evolve to help maintain homeostasis in organisms as they respond to stimuli

Small non polar hydrophobic

Polar large molecules