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Listen 98 74 Endocytosis Key Idea: Endocytosis is an active transport process in which the cell engulfs material and draws it in. Endocytosis is a type of active transport in which the plasma membrane folds around a substance to transport it across the plasma membrane into the cell. The ability of cells to do this is a function of the flexibility of the plasma membrane. Material (solids or fluids) that are to be brought into the cell are engulled by an infolding of the plasma membrane. Plasma membrane Vesicle buds inwards from The vesicle carries molecules into the cell. the plasma membrane The contents may then be digested by enzymes delivered to the vacuole by lysosomes. Receptors and pit beginning to form HIV particle Phagocytosis (or 'cell-eating') involves the cell engulfing solid material to form large phagosomes or vacuoles (e.g. food vacuoles). It may be non-specific or receptor- receptor proteins on the membrane so that mediated. Examples: Feeding in Amoeba, phagocytosis of foreign material and cell debris by neutrophils and macrophages. Receptor mediated endocytosis is triggered when certain metabolites, hormones, or viral particles bind to specific Pinocytosis (or 'cell-drinking") involves the non-specific uptake of liquids or fine suspensions into the cell to form small pinocylic vesicles. Pinocytosis is used primarily for absorbing extracellular fluid. Examples: Uptake in many protozoa, scme cells of the liver, and some plant cells. the material can be engulfed. Examples: The uptake of lipoproteins by mammalian cells and endocytosis of viruses (above). ? 1. What is the purpose on endocytosis? 2. Is endocytosis active or passive transport? 3. Describe the following types of endocytosis: (a) Phagocytosis: (b) Receptor mediated endocytosis: (c) Pinocytosis: ? 4. Explain how the plasma membrane can form a vesicle:

Listen 98 74 Endocytosis Key Idea: Endocytosis is an active transport process in which the cell engulfs material and draws it in. Endocytosis is a type of active transport in which the plasma membrane folds around a substance to transport it across the plasma membrane into the cell. The ability of cells to do this is a function of the flexibility of the plasma membrane. Material (solids or fluids) that are to be brought into the cell are engulled by an infolding of the plasma membrane. Plasma membrane Vesicle buds inwards from The vesicle carries molecules into the cell. the plasma membrane The contents may then be digested by enzymes delivered to the vacuole by lysosomes. Receptors and pit beginning to form HIV particle Phagocytosis (or 'cell-eating') involves the cell engulfing solid material to form large phagosomes or vacuoles (e.g. food vacuoles). It may be non-specific or receptor- receptor proteins on the membrane so that mediated. Examples: Feeding in Amoeba, phagocytosis of foreign material and cell debris by neutrophils and macrophages. Receptor mediated endocytosis is triggered when certain metabolites, hormones, or viral particles bind to specific Pinocytosis (or 'cell-drinking") involves the non-specific uptake of liquids or fine suspensions into the cell to form small pinocylic vesicles. Pinocytosis is used primarily for absorbing extracellular fluid. Examples: Uptake in many protozoa, scme cells of the liver, and some plant cells. the material can be engulfed. Examples: The uptake of lipoproteins by mammalian cells and endocytosis of viruses (above). ? 1. What is the purpose on endocytosis? 2. Is endocytosis active or passive transport? 3. Describe the following types of endocytosis: (a) Phagocytosis: (b) Receptor mediated endocytosis: (c) Pinocytosis: ? 4. Explain how the plasma membrane can form a vesicle:

Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter5: Membranes And Transport
Section: Chapter Questions
Problem 1TYK: In the fluid mosaic model: plasma membrane proteins orient their hydrophilic sides toward the...
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Listen 98 74 Endocytosis Key Idea: Endocytosis is an active transport process in which the cell engulfs material and draws it in. Endocytosis is a type of active transport in which the plasma membrane folds around a substance to transport it across the plasma membrane into the cell. The ability of cells to do this is a function of the flexibility of the plasma membrane. Material (solids or fluids) that are to be brought into the cell are engulled by an infolding of the plasma membrane. Plasma membrane Vesicle buds inwards from The vesicle carries molecules into the cell. the plasma membrane The contents may then be digested by enzymes delivered to the vacuole by lysosomes. Receptors and pit beginning to form HIV particle Phagocytosis (or 'cell-eating') involves the cell engulfing solid material to form large phagosomes or vacuoles (e.g. food vacuoles). It may be non-specific or receptor- receptor proteins on the membrane so that mediated. Examples: Feeding in Amoeba, phagocytosis of foreign material and cell debris by neutrophils and macrophages. Receptor mediated endocytosis is triggered when certain metabolites, hormones, or viral particles bind to specific Pinocytosis (or 'cell-drinking") involves the non-specific uptake of liquids or fine suspensions into the cell to form small pinocylic vesicles. Pinocytosis is used primarily for absorbing extracellular fluid. Examples: Uptake in many protozoa, scme cells of the liver, and some plant cells. the material can be engulfed. Examples: The uptake of lipoproteins by mammalian cells and endocytosis of viruses (above). ? 1. What is the purpose on endocytosis? 2. Is endocytosis active or passive transport? 3. Describe the following types of endocytosis: (a) Phagocytosis: (b) Receptor mediated endocytosis: (c) Pinocytosis: ? 4. Explain how the plasma membrane can form a vesicle:
Transcribed Image Text:Listen 98 74 Endocytosis Key Idea: Endocytosis is an active transport process in which the cell engulfs material and draws it in. Endocytosis is a type of active transport in which the plasma membrane folds around a substance to transport it across the plasma membrane into the cell. The ability of cells to do this is a function of the flexibility of the plasma membrane. Material (solids or fluids) that are to be brought into the cell are engulled by an infolding of the plasma membrane. Plasma membrane Vesicle buds inwards from The vesicle carries molecules into the cell. the plasma membrane The contents may then be digested by enzymes delivered to the vacuole by lysosomes. Receptors and pit beginning to form HIV particle Phagocytosis (or 'cell-eating') involves the cell engulfing solid material to form large phagosomes or vacuoles (e.g. food vacuoles). It may be non-specific or receptor- receptor proteins on the membrane so that mediated. Examples: Feeding in Amoeba, phagocytosis of foreign material and cell debris by neutrophils and macrophages. Receptor mediated endocytosis is triggered when certain metabolites, hormones, or viral particles bind to specific Pinocytosis (or 'cell-drinking") involves the non-specific uptake of liquids or fine suspensions into the cell to form small pinocylic vesicles. Pinocytosis is used primarily for absorbing extracellular fluid. Examples: Uptake in many protozoa, scme cells of the liver, and some plant cells. the material can be engulfed. Examples: The uptake of lipoproteins by mammalian cells and endocytosis of viruses (above). ? 1. What is the purpose on endocytosis? 2. Is endocytosis active or passive transport? 3. Describe the following types of endocytosis: (a) Phagocytosis: (b) Receptor mediated endocytosis: (c) Pinocytosis: ? 4. Explain how the plasma membrane can form a vesicle:
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