Movement of substances

Question 1

diffusion

Answer 1

the passive net movement of molecules for an area of high concentration to low concentration. small, non polar molecules like oxygen and carbon dioxide can diffuse through a membrane between phosphlipid molecules

Question 2

osmosis

Answer 2

the passive, net movement of free water molecules across a partially permeable membrane from high water concentrations to low against a solute concentration gradient

Question 3

facilitated diffusion

Answer 3

the passive, net movement of molecules across a membrane from high to low concentration through a protein channel which is specific to the larger, non polar molecule like glucose of amino acids

Question 4

active transport

Answer 4

the active movement of molecules across a membrane from a lower concentration to high through a specific protein carrier. larger or polar molecules can pass through a membrane this way

Question 5

endo and exocytosis

Answer 5

active movement of larger molecules like proteins