Cell Membrane
Chamberlain College Of Nursing
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Exam (elaborations)
BISC 440 Lab 9: Cell Membrane and Transport questions and answers (graded A+)
Active transport 
Energy-requiring movement of molecules across a membrane from a region of lower concentration 
to a region of higher concentration. 
Cell membrane 
Forms a boundary between a cell and the surrounding environment and controls the passage of 
materials into and out of the cell. 
Concentration gradient 
Difference in the concentration of a substance from one location to another. 
Diffusion 
Movement of dissolved molecules in a fluid or gas from a region of higher concentration to ...