Kidneys
Biology: AQA GCSE Higher, topic 5.3.11
Kidneys
The kidneys are important for homeostasis. They control the water and ion levels in the blood.
Ion levels
- The body's ion levels must be kept relatively constant to control osmosis and diffusion between cells in the body.
Excess water
- The volume of water in the blood is monitored by the hypothalamus in the brain.
Test yourself on Kidneys
Why must ion levels in the body be kept relatively constant?
Which statement about the kidneys is correct?
What would most likely happen to osmosis and diffusion between cells if the ion levels in the blood were not kept relatively constant?
What would most likely happen if the kidneys failed to control the water and ion levels in the blood?
Which statement about the hypothalamus is correct?