Anatomy & Physiology › Section W · The urinary system › Topic W.5
Fluid volume, composition, and homeostasis
The kidneys do far more than make urine. By adjusting what they keep and what they let go, they set blood volume and pressure, steady the main ions, clear wastes and drugs, and make hormones that reach bone marrow and the gut. This topic pulls those roles together and shows what happens when they fail.
In this topic
- Sensing volume
- Volume and concentration are separate jobs
- Worked example: how finely sodium is tuned
- Diuretics
- Everyday diuretics
- Worked example: predicting a diuretic's effects
- Regulating the main ions
- Clearing wastes and drugs
- Hormones made by the kidney
- When the kidneys fail
- Common mistakes to avoid
- Key takeaways
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