The Kidneys and Homeostasis
- Created by: Sophie
- Created on: 27-04-13 11:07
View mindmap
- The Kidneys and Homeostasis
- Kidneys filter the blood
- Remove urea from blood
- Regulate ion content of blood
- Regulate water content of blood
- Removal of urea
- Proteins can't be stored by the body, so excess amino acids are turned into fats or catbohydrates which can be stored
- This happens in the liver. Urea is a waste product from these reactions
- Poisonous. Released into bloodstream by liver, then kidneys filter it out of blood; it is excreted as urine
- Proteins can't be stored by the body, so excess amino acids are turned into fats or catbohydrates which can be stored
- Adjustment of ion content
- Ions taken in by food, absorbed into blood
- If ion/water content is wrong then there could be an imbalance of ions and water, meaning too much or too little water could be drawn into cells via osmosis, damaging them
- Excess ions removed by kidneys, e.g sodium
- Ions also lost in sweat
- Balance maintained by kidneys
- Adjustment of water content
- Water taken in from food and drink, removed from urine, sweat and in the air as we breather out
- Constant balance between water out and water in: balanced between liquids consumed, amount sweated out, amount excreted by the kidneys in urine
- On a cold day, you don't sweat so will produce more urine which will be pale and dilute
- On a hot day you sweat a lot so will produce less urine that is concentrated and dark- coloured
- Balanced needs to be restored
- Sports Drinks
- Usually contains sugar, water, ions
- Water and ions replace those lost in sweat
- Sugar replaces the sugar that's used up by muscles during respiration
- Some manufacturers claim their products rehydrate faster or improve endurance.
- Kidneys filter the blood
Similar Biology resources:
Teacher recommended
Teacher recommended
Comments
No comments have yet been made