The Kidney, urine formation and water absorption

Flash cards covering the topics in the excretion module of A Level OCR Biology unit 4 regarding The Kidney, the formation of urine and water absorption.

What is the name of the outer region of the kidney?
The Cortex
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What is the name of the tiny tubules in the kidney?
Nephrons
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What is nearest part of the nephron called?
The prixmal convoluted tubule
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How is the composition of the nephron altered?
Selective reabsorption
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What happens to the water potential of the composition in the descending limb of the loop of henle?
It decreases
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What type of vessels carry blood away from the glomerulus and what is it specifically?
Efferent vessels- arteriole
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What is the most important layer between the capillary and the Bowman's Capsule in ultrafiltration?
The basement membrane
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How much reabsorption occurs in the proximal convoluted tubule?
85%
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What is the name of the arrangement of tubule so that different parts of the tubule face in different directions?
Hairpin countercurrent multiplier
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Which part of the kidney does reabsorption of water NOT occur?
The Pelvis
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What is the relative water potential of the medulla?
Low
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What is removed from the ascending limb of the loop of henle and how is it achieved?
Sodium and chloride ions by active transport
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In what part of the medulla is the water potential highest?
At the top
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Other cards in this set

Card 2

Front

What is the name of the tiny tubules in the kidney?

Back

Nephrons

Card 3

Front

What is nearest part of the nephron called?

Back

Preview of the front of card 3

Card 4

Front

How is the composition of the nephron altered?

Back

Preview of the front of card 4

Card 5

Front

What happens to the water potential of the composition in the descending limb of the loop of henle?

Back

Preview of the front of card 5
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