Cell Transport and Homeostasis Quiz

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.