Kidneys & Homeostasis
- Created by: Jo Wells
- Created on: 27-04-13 17:19
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- Kidneys & Homeostasis
- removal of urea
- proteins can't be stored by body
- process occurs in liver
- urea is produced as a waste product from the reactions
- urea = poisonous
- is released into bloodstream by liver
- kidneys then filter it out of the blood
- temporarily stored in bladder in urine & then excreted from body
- kidneys then filter it out of the blood
- is released into bloodstream by liver
- urea = poisonous
- urea is produced as a waste product from the reactions
- excess amino acids are converted into fats & carbs, which can be stored
- process occurs in liver
- proteins can't be stored by body
- adjustment of ion content
- ions (e.g. sodium) are taken into body in food, then absorbed into blood
- if ion content (or water) is wrong, it upsets balance between ions and water
- meaning too much/too little water is drawn into cells via osmosis
- having wrong amount water can damage cells
- meaning too much/too little water is drawn into cells via osmosis
- excess ions are removed by the kidneys
- some ions are also lost in sweat
- adjustment of water content
- water is taken in as food & drink & is lost in urine, sweat & the air we breathe out
- body has to constantly balance water coming in against water going out
- we can't balance how much we lose in our breath, but body can balance liquids consumed, amount sweated out & amount excreted by the kidneys in the urine
- on a cold day
- if don't sweat, produce more urine = pale & dilute
- on a hot day
- sweat a lot, produce less urine = dark coloured & concentrated
- on a cold day
- we can't balance how much we lose in our breath, but body can balance liquids consumed, amount sweated out & amount excreted by the kidneys in the urine
- sports drinks replace lost water, sugar & ions
- help the body keep things in order
- water & ions replace those lost in sweat, while sugar can replace sugar used by muscles in exercise
- some claim to rehydrate you faster than water or improve endurance
- help the body keep things in order
- removal of urea
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