Identify all of the following which use ATP either directly or indirectly.Group of answer choicesfacilitated diffusion via a channel proteinactive transportautophagysimple diffusionfacilitated diffusion via a carrier proteincotransportreceptor-mediated endocytosisexocytosisphagocytosispinocytosisendocytosisNext
Question
Identify all of the following which use ATP either directly or indirectly.Group of answer choicesfacilitated diffusion via a channel proteinactive transportautophagysimple diffusionfacilitated diffusion via a carrier proteincotransportreceptor-mediated endocytosisexocytosisphagocytosispinocytosisendocytosisNext
Solution
The processes that use ATP either directly or indirectly are:
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Active transport: This process uses ATP directly to move substances across a cell membrane against a concentration gradient.
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Autophagy: This process uses ATP indirectly. It is the process by which cells recycle their own components to provide the necessary building blocks for maintaining cellular functions and adapting to changing conditions.
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Facilitated diffusion via a carrier protein: This process can indirectly use ATP. The carrier protein changes shape to move the particle across the membrane, and this process can be powered by ATP.
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Cotransport: This process indirectly uses ATP. It involves the simultaneous transport of two substances across a membrane by one protein, or protein complex, and is powered by ATP.
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Receptor-mediated endocytosis: This process uses ATP indirectly. It is a process by which cells absorb metabolites, hormones, proteins – and in some cases viruses – by the inward budding of the plasma membrane.
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Exocytosis: This process uses ATP directly. It is the process by which a cell transports secretory products through the cytoplasm to the plasma membrane.
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Phagocytosis: This process uses ATP directly. It is the process by which a cell engulfs a solid particle to form an internal compartment known as a phagosome.
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Pinocytosis: This process uses ATP directly. It is a mode of endocytosis in which small particles are brought into the cell, forming an invagination, and then suspended within small vesicles.
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Endocytosis: This process uses ATP directly. It is a cellular process in which substances are brought into the cell.
The processes that do not use ATP either directly or indirectly are:
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Facilitated diffusion via a channel protein: This process does not use ATP. It is a passive process that is driven by the concentration gradient.
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Simple diffusion: This process does not use ATP. It is a passive process driven by the concentration gradient.
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