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Movement Across Cell Membranes (Passive Processes (Does not require ATP…
Movement Across Cell Membranes
Passive Processes
Does not require ATP
Facilitated Diffusion
Down Concentration gradient
Molecular motion
Osmosis
Down Concentration gradient
Molecular motion
Filtration
Pressure gradient
Hydrostatic pressure
Diffusion
Down Concentration gradient
Molecular motion
Active Processes
Requires ATP
Endocytosis
Pinocytosis
Engulfs water and solutes
Phagocytosis
Engulfs bacterial/human cells
Receptor-mediated endocytosis
Engulfs selected molecules
Cholesterol molecules (LDL)
Exocytosis
Use of vessicles
Protein secretion
Neurotransmitters
Transcytosis
HIV infects this way
Active Transport
Up concentration gradient
Ions
Amino acids