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Questions and Answers
Which type of molecules flow easily through the semipermeable membrane?
Which type of molecules flow easily through the semipermeable membrane?
What is the main difference between passive and active transport?
What is the main difference between passive and active transport?
In which direction do molecules move during active transport?
In which direction do molecules move during active transport?
What type of molecules do not move through the semipermeable membrane on their own?
What type of molecules do not move through the semipermeable membrane on their own?
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What is required in passive transport but not in active transport?
What is required in passive transport but not in active transport?
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Study Notes
Cell Transport and Homeostasis
- Homeostasis is the balanced internal condition of cells, also known as equilibrium, and is maintained by the cell membrane controlling what enters and leaves the cell.
- The cell membrane is semipermeable, allowing small and hydrophobic molecules like oxygen, carbon dioxide, and water to flow easily through.
- However, ions, hydrophilic molecules larger than water, and large molecules such as proteins do not move through the membrane on their own.
- There are two types of cell transport: passive and active.
- Passive transport does not require cellular energy and involves molecules moving from a region of higher concentration to a region of lower concentration.
- Active transport, on the other hand, requires cellular energy and involves molecules moving from a region of lower concentration to a region of higher concentration.
- Active transport is a rapid process, while passive transport is comparatively slow.
- Carrier proteins are required in active transport, while in passive transport, carrier proteins are not required.
- Examples of molecules that move easily through the semipermeable membrane include oxygen, carbon dioxide, and water.
- Passive transport allows molecules to move from an area of higher concentration to an area of lower concentration without the need for cellular energy.
- In active transport, molecules move from an area of lower concentration to an area of higher concentration and require cellular energy.
- Homeostasis, the balanced internal condition of cells, is crucially maintained by the cell membrane's control over the movement of substances in and out of the cell.
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Description
Test your knowledge of cell transport and homeostasis with this quiz. Explore the concepts of equilibrium, semipermeable membranes, and the movement of molecules in and out of cells. Gain a deeper understanding of how cells maintain a balanced internal condition.
