The Urinary System (LC 2027) (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
How many nephrons does each kidney contain?
How many nephrons does each kidney contain?
Over one million
What is the approximate length of a single nephron?
What is the approximate length of a single nephron?
3 centimetres
Where does initial filtration occur in the nephron?
Where does initial filtration occur in the nephron?
Bowman's capsule
Which part of the nephron performs most of the reabsorption work?
Which part of the nephron performs most of the reabsorption work?
Proximal convoluted tubule
What can pass through the walls of the descending limb of the loop of Henle?
What can pass through the walls of the descending limb of the loop of Henle?
Water
What is unique about the ascending limb of the loop of Henle?
What is unique about the ascending limb of the loop of Henle?
It permits salt but not water
Which blood vessel brings blood into the glomerulus?
Which blood vessel brings blood into the glomerulus?
Afferent arteriole
How much glomerular filtrate is produced every 24 hours?
How much glomerular filtrate is produced every 24 hours?
About 180 litres
Which substances are prevented from being filtered out of the blood?
Which substances are prevented from being filtered out of the blood?
Proteins and blood cells
What percentage of glomerular filtrate is reabsorbed by the nephron?
What percentage of glomerular filtrate is reabsorbed by the nephron?
Approximately 99%
Which substances are completely recovered in the proximal convoluted tubule?
Which substances are completely recovered in the proximal convoluted tubule?
Glucose, amino acids & vitamins
What is the typical final volume of urine produced per day?
What is the typical final volume of urine produced per day?
Approximately 1.5 litres
How does urine differ from glomerular filtrate?
How does urine differ from glomerular filtrate?
More concentrated with no glucose