Unit 3 Study Guide Flashcards
What is diffusion
Movement of molecules from higher to lower concentration due to Kentic energy of molecules
What does it mean when something is semi-permeable
Allows some molecules to enter cell and keeps molecules out
What is osmosis
Movement of water molecules from higher to lower concentrations across a semi-permeable membrane
How are osmosis and diffusion different
Diffusion is movement of molecules from higher to lower concentrations osmosis is movement of water molecules from higher to lower concentrations
What is passive transport
Substance moves from higher to lower concentrations due to Kentic energy
(No energy used)
What materials are moved in and out of cell during passive transport
02
H20
Glucose
Why is passive transport needed for cell to function properly
Maintains the correct amount of specific molecules in and out of cell
What is active transport
Substance moves from lower to higher concentration due to Kentic energy expenditure by the cell
What type of materials are moved in and out the cell during active transport
Ions , amino , acid
Why is active transport needed for cell to function properly
Creates on area of high concentration of molecules needed by cell
What is endocytosis
Process by which cells absorb molecules from outside or external surroundings by the cell wrapping around them
Why is endocytosis important
Brings needed molecules into cell
Describe and identify the 2 types of endocytosis
Phagocytosis- cell membrane extends outwards to bring solid particles into cell
Pinocytosis- cell membrane sinks inwards to draw liquid in particles into cell forms bubble like vesicles in cell
What is exocytosis
Cell regurgitation the cell fuses vesicles to the cell membrane in order to create particles
Why is exocytosis important
Transport waste materials out of cell
