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Movement of Materials In and Out of Cells. Packet #12 Chapter #3. Introduction. The movement of materials in and out of cells, is important for multiple functions of the cell. Processes include Diffusion Osmosis Endocytosis Phagocytosis Pinocytosis Exocytosis. Diffusion. Diffusion I.
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Movement of Materials In and Out of Cells Packet #12 Chapter #3
Introduction • The movement of materials in and out of cells, is important for multiple functions of the cell. • Processes include • Diffusion • Osmosis • Endocytosis • Phagocytosis • Pinocytosis • Exocytosis
Diffusion I • The movement of materials in and out of the cell • Important process of bodily function • Allows oxygen and carbon dioxide to enter and leave cells • Respiration • Allows simple sugars and fats to enter and leave cells • Digestion
Diffusion II • Regular Diffusion • Movement of substances from an area of high concentration to low concentration • No proteins are used • No ATP is used • Adenosine Tri-Phosphate • Energy
Diffusion III • Facilitated Diffusion • The movement of molecules from an area of high concentration to an area of low concentration with the use of a protein. • No ATP is used
Diffusion IV • Active Transport • The movement of a substance from an area of low concentration to an area of high concentration with the use of a protein and ATP
Diffusion VOsmosis • Osmosis • Special type of diffusion • The movement of a liquid solvent from an area of high concentration to an area of low concentration through a semi-permeable membrane. • The membrane does not allow solutes to pass through.
OsmosisHypertonic vs. Hypotonic • Hypertonic Solution • High concentration of solute • Low concentration of solvent • Solvent wants to enter • Hypotonic Solution • Low concentration of solute • High concentration of solvent • Solvent wants to leave
Phagocytosis • The take up of large particles by cells via vesicles formed in the plasma membrane • The cell invaginates to form a depression in which particles are contained • This then pinches off to form a vacuole • White blood cells • Neutrophils • Monocytes
Pinocytosis • The take up of liquids rather than solids • Vacuoles are smaller than those used during phagocytosis
Endocytosis vs. Exocytosis • Both phagocytosis and pinocytosis involve the taking of materials into the cell in bulk. • These are examples of endocytosis • The removal of materials from the cell in bulk is called exocytosis.
