Nephrons (Leaving Cert Biology): Flashcards
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Number of nephrons per kidney
Number of nephrons per kidney
Over one million
Length of a nephron
Length of a nephron
3 centimetres
Primary function of nephrons
Primary function of nephrons
Filtration and processing units
Bowman's capsule function
Bowman's capsule function
Initial filtration occurs
Proximal convoluted tubule main role
Proximal convoluted tubule main role
Performs most reabsorption
Loop of Henle descending limb allows
Loop of Henle descending limb allows
Water to pass through
Loop of Henle ascending limb allows
Loop of Henle ascending limb allows
Salt movement, not water
Distal convoluted tubule function
Distal convoluted tubule function
Fine-tunes composition of urine
Collecting duct function
Collecting duct function
Final adjustments to water and salt balance
Location of filtration in nephron
Location of filtration in nephron
Glomerulus within Bowman's capsule
Daily glomerular filtrate volume
Daily glomerular filtrate volume
180 litres per 24 hours
% of glomerular filtrate reabsorbed
% of glomerular filtrate reabsorbed
99%
Proximal tubule reabsorbs
Proximal tubule reabsorbs
Most water, glucose, amino acids, vitamins, salts
Final daily urine volume
Final daily urine volume
1.5 litres per day
Two main processes in urine formation
Two main processes in urine formation
Filtration and reabsorption