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3.3 Maintaining internal environments

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Question 30
H

Seawater has a lower water potential than blood plasma.

Drinking a large volume of seawater can damage the cells of the body.

Which statement explains why?

[1]
A

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

B

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

C

Salt moves into the cells by osmosis from the blood, so the cells burst.

D

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

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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