9700 · 4.2
Movement into and out of cells
Ever wondered how a single cell, the fundamental unit of life, manages to acquire nutrients, excrete waste, and maintain its internal balance? It all comes down to **movement into and out of cells**. This crucial topic in Cambridge International Biology 9700 explores the diverse mechanisms by which substances navigate the **partially permeable cell membrane**, ranging from passive processes like **diffusion** and **osmosis** to energy-intensive methods such as **active transport** and **bulk transport**. Understanding these processes is not just theoretical; it's fundamental to comprehending how organisms function at every level.
Need to know
What you need to know
- Distinguish between different modes of transport across cell membranes, including passive and active processes.
- Explain the concept of water potential and its role in osmosis across partially permeable membranes.
- Describe the mechanisms of bulk transport (endocytosis and exocytosis) and their cellular significance.
Explanation
Movement into and out of cells
- Distinguish between different modes of transport across cell membranes, including passive and active processes.
- Explain the concept of water potential and its role in osmosis across partially permeable membranes.
- Describe the mechanisms of bulk transport (endocytosis and exocytosis) and their cellular significance.