Study

For exam study, not clinical practice. Always follow your clinical instructors and current guidelines.

PHS-101 route
Unit 3 · Lesson 3 of 5 10 min

Water Balance and Its Regulation

Every day about two and a half litres come in and the same leave, and three hormones keep the books balanced.

What this unit covers

Unit 3: Body Fluids and Electrolytes

  1. 1 Body Fluid CompartmentsA 70 kg man carries about 42 litres of water, and every litre has an address. · 10 min
  2. 2 ElectrolytesSodium rules outside the cell, potassium rules inside, and the difference keeps you alive. · 9 min
  3. 3 Water Balance and Its RegulationEvery day about two and a half litres come in and the same leave, and three hormones keep the books balanced. · 10 min
  4. 4 Capillary Exchange and OedemaTwo pressures fight over every drop of fluid in your tissues. When one wins too often, ankles swell. · 10 min
  5. 5 Acid–Base BalanceYour blood lives on a knife-edge between 7.35 and 7.45, guarded by three lines of defence. · 10 min