Multiple Choice
What happens to the membrane of a vesicle after exocytosis?
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6. The Membrane
Endocytosis and Exocytosis
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What is the primary difference between phagocytosis and pinocytosis?
A
Phagocytosis is a form of exocytosis, while pinocytosis is a form of endocytosis.
B
Phagocytosis involves the ingestion of solid particles, while pinocytosis involves the ingestion of liquid.
C
Phagocytosis occurs in plant cells, while pinocytosis occurs in animal cells.
D
Phagocytosis requires energy, while pinocytosis does not.
Verified step by step guidance1
Understand the context: Both phagocytosis and pinocytosis are forms of endocytosis, which is the process by which cells internalize substances from their external environment.
Identify the nature of substances involved: Phagocytosis involves the ingestion of large solid particles, such as bacteria or dead cells, whereas pinocytosis involves the ingestion of liquids and dissolved substances.
Consider the cellular process: In phagocytosis, the cell membrane engulfs solid particles to form a phagosome, which is then internalized. In pinocytosis, the cell membrane forms small vesicles around droplets of extracellular fluid.
Clarify the energy requirement: Both phagocytosis and pinocytosis are active processes that require energy in the form of ATP, as they involve the movement of the cell membrane.
Differentiate based on cell types: While both processes can occur in animal cells, phagocytosis is more commonly associated with specialized cells like macrophages, whereas pinocytosis is a more general process that can occur in many cell types.
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