Types of passive and active transport Flashcards
Simple diffusion- What substances are able to diffuse directly though the bilayer
-nonpolar
-lipid soluble
When polar substances such as water and ions diffuse but with the aid or protein channels
Faciliated diffusion
During faciliated diffusion molecules which can not pass through the lipid bilayer because of size or polarity pass using what?
Protein carriers or channels
What is transport dependent on? In active transport
The number of channels on the cell membrane
The diffusion of water across a semi permeable membrane
osmosis
Water moves depending on what?
concentration through channels lined with proteins called aquaporins
What does active transport require?
ATP
How do substances move in active transport?
Low to high concentration
What are the 2 types of active transport
Primary and secondary transport
What occurs during primary active transport?
Primary Active Transport uses ATP
directly to move a solute across the
plasma membrane, against the gradient.
What is the best example of primary active transport?
sodium-potassium pump