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Questions and Answers
What is the process called when a cell imports molecules and particles by folding the cell membrane inwards?
What are the circular buds comprised of membrane that are formed around the substance to be digested during endocytosis called?
What prefix means 'within' and is associated with the process of endocytosis?
Which type of endocytosis involves the process of recognizing and targeting a substrate?
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What protein coats vesicles during endocytosis and is not involved in caveolae-based endocytosis?
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Which cellular structure contains digestive enzymes and is involved in the breakdown of food and foreign material?
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What can exocytosis be used for?
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What becomes part of the cell membrane during exocytosis?
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Which example illustrates a function of exocytosis?
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What is the purpose of adding new integral membrane proteins to the cell membrane?
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Study Notes
- Four types of endocytosis: phagocytosis, pinocytosis, receptor-mediated endocytosis, caveolae-based endocytosis
- Phagocytosis: process of engulfing large molecules or cells, membrane folds around the object, forms a vesicle, non-specific
- Pinocytosis: process of taking up small dissolved substances and liquids, membrane forms small vesicles, non-specific
- Receptor-mediated endocytosis: specific process of recognizing and targeting a substrate, integral membrane proteins (receptor proteins) bind to a target, vesicle forms around the target, specific
- Clathrin: protein that coats vesicles during endocytosis, not involved in caveolae-based endocytosis
- Caveolae: pockets in the plasma membrane, do not have a clathrin-based protein lining, have caveolins as membrane proteins, still debated if they involve endocytosis but caveolin-1 is known to be involved
- Lysosomes: structures in the cell containing digestive enzymes, vesicles fuse with lysosomes, breakdown food and foreign material, recycling and reuse of digested material, digestive enzymes work optimally in acidic environment
- Exocytosis: process of exporting substances from the cell through a vesicle fusing with the cell membrane, eliminates waste that the cell cannot digest, not all material is destined for degradation in lysosomes.
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Description
Test your knowledge about how cells transport substances across the cell membrane, including the process of endocytosis. Explore how cells engulf and internalize substances like nutrients or molecules using this quiz.
