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Name the three aspects of the cell theory.
All living things are made up of one or more cells , cells are the basic building blocks of life ,
new cells are produced from existing cell
What type of transport does not require energy
Passive transport
true or false- cell walls are absent in animal cells
true
what is passive transport?
when substances move from a region of high concentration to a region of low concentration EG;
osmosis
what type of energy requires energy?
active transport
describe active transport...
when substances move from an area of low concentration to a high concentration area
name two examples of active transport.
endocytosis (into cell) , Exocytosis (out of cell)
what does active transport use?
a protein channel and ATP