Unit 2: Life is Cellular - CELL TRANSPORT
Terms in this set (15)
What is Passive Transport?
The movement of materials across the cell membrane
What is diffusion?
When particles move from an area of high concentration to lower concentration.
What does facilitated mean?
What is facilitated diffusion?
Proteins in the cell membrane act as helpers making it easy for certain molecules to cross.
What is osmosis?
The movement of water through cell membranes by facilitated diffusion.
What does hydro mean?
What does phobic mean?
fear or afraid
What does hydrophobic mean?
What happens because of the water hating lipid bi-layer?
Water molecules have a tough time passing through the cell membrane.
What are aquaporins?
Cells that contain water channels proteins that allow water to pass right though them.
What is active transport?
the movement of materials from LOW to HIGH concentration.
What does active transport require?
Energy in the form of ATP
What is Bulk Transport?
Larger molecules can be transported by movements of the cell membrane.
What is Endocytosis?
It is when materials ENTER the cell.
What is Exocytosis?
It is when materials EXIT the cell.