A red blood cell is placed in a solution with a higher water potential than its cytoplasm.
What happens to the red blood cell?
Water leaves the cell by osmosis and the cell shrinks.
Water enters the cell by active transport and it swells.
There is no net movement of water, so it stays the same.
Water enters the cell by osmosis and the cell bursts.
72 exam-style questions on OCR GCSE Biology 3.3 Maintaining internal environments, covering 3.3.1 Importance of a constant internal environment, 3.3.2 The skin and body temperature, 3.3.3 Insulin and blood sugar, 3.3.4 Glucagon and blood sugar, 3.3.5 Type 1 and type 2 diabetes, 3.3.6 Osmotic changes in body fluids, 3.3.7 Kidneys and water balance, 3.3.8 Structure of the kidney and tubule, 3.3.9 ADH and kidney tubule permeability, and 3.3.10 Responses to temperature and osmotic challenges. Each one has a worked solution and a mark scheme showing where the marks go.