Questions and Answers
Endocytosis requires energy
True
Exocytosis requires energy
True
Exocytosis brings things into the cell
False
Endocytosis removes things from the cell
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Passive transport does not require energy
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Diffusion is an example of passive transport
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Sugars pass through the cell membrane without the aid of proteins
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Osmosis is the transport of ions from high concentrations to low concentrations
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Only molecules that are entering the cell from the outside can diffuse via passive transport
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What is the term for molecules that are too big to go through the cell membrane?
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What is the passage of small molecules called?
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What is the movement of water called?
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In passive cell transport, substances move from ______ concentrations to ______ concentrations
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In order for substances to diffuse, a ______ gradient must exist
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A concentration gradient is a ______ of concentrations between two regions
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______ proteins or channel proteins are used to aid substances across the cell membrane in passive transport
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During passive transport, substances travel ______ the concentration gradient
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Facilitated diffusion uses ______ proteins to help aid some substances across the cell membrane
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Cell membranes are ______ ______ because they allow some substances to pass through more easily than others
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Study Notes
Cell Transport Concepts
- Endocytosis is an energy-dependent process for bringing substances into a cell.
- Exocytosis, which expels materials from the cell, also requires energy.
- Exocytosis is characterized by the release of substances, not the entry into the cell.
- Endocytosis does not function to remove substances; it specifically transports materials into the cell.
Passive Transport Mechanisms
- Passive transport is characterized by movement that does not require energy.
- Diffusion exemplifies passive transport, allowing substances to move freely.
- Sugars cannot pass through the cell membrane without the assistance of protein channels.
- Osmosis is specifically the movement of water, not ions.
Concentration and Movement Principles
- Passive transport allows for the movement of molecules from high concentrations to low concentrations.
- A concentration gradient must exist for substances to diffuse, indicating a difference in concentration between two regions.
- Carrier proteins or channel proteins facilitate the movement of substances across the cell membrane during passive transport.
- During passive transport, substances move with the concentration gradient, from areas of higher concentration to areas of lower concentration.
Facilitated Diffusion
- Facilitated diffusion involves proteins to assist certain substances in crossing the cell membrane, particularly those that cannot passively diffuse.
Membrane Properties
- Cell membranes are described as selectively permeable, meaning they selectively allow certain substances to pass while restricting others.
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Description
Test your knowledge on cell transport mechanisms with this fun quiz! Explore concepts such as endocytosis and exocytosis, and determine whether they require energy. Perfect for biology students looking to reinforce their understanding of cellular processes.
