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3.3 Maintaining internal environments

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Question 14
F

A solution is added to a sample of blood. The solution has a lower water potential than the cytoplasm of the red blood cells.

What happens to the red blood cells?

[1]
A

Water moves into the cells by osmosis, so the cells burst.

B

No water moves, because the cells are surrounded by plasma.

C

Water moves out of the cells by osmosis, so the cells shrink.

D

Salt moves out of the cells by diffusion, so the cells shrink.

Markscheme

3.3 Maintaining internal environments Questions

  1. GCSE
  2. /Biology
  3. /3.3 Maintaining internal environments

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.

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