The kidneys (Edexcel GCSE Biology): Flashcards
📚Flashcards
Practise the cards
15 cards from this deck
ShowHide
Practise the cards
15 cards from this deck
Function of urinary system
Function of urinary system
Filters blood, removes waste, regulates water & ion balance
Main roles of kidneys
Main roles of kidneys
Filter blood, remove urea, regulate water & minerals
Blood vessel bringing blood to kidneys
Blood vessel bringing blood to kidneys
Renal artery
Contents of urine
Contents of urine
Urea, excess water, excess ions
Functional unit of kidney
Functional unit of kidney
Nephron (over 1 million per kidney)
Where filtration occurs in nephron
Where filtration occurs in nephron
Glomerulus & Bowman's capsule
Small molecules filtered from blood
Small molecules filtered from blood
Water, ions, glucose, urea
Why proteins stay in blood during filtration
Why proteins stay in blood during filtration
Too big to pass through capillary walls
Where is all glucose reabsorbed
Where is all glucose reabsorbed
Proximal convoluted tubule (by active transport)
Where urea is produced
Where urea is produced
Liver (from breakdown of excess amino acids)
Why ammonia is converted to urea
Why ammonia is converted to urea
Ammonia is toxic; urea is less toxic
pH range kidneys maintain in blood
pH range kidneys maintain in blood
7.35-7.45
Hormone controlling water reabsorption
Hormone controlling water reabsorption
ADH (Anti-Diuretic Hormone)
Effect of high ADH levels on urine
Effect of high ADH levels on urine
Small volumes of concentrated urine
Effect of low ADH levels on urine
Effect of low ADH levels on urine
Large volumes of dilute urine