The diagram shows the structure of a nephron and part of its associated blood supply - Leaving Cert Biology - Question 6 - 2018
Question 6
The diagram shows the structure of a nephron and part of its associated blood supply.
(a) Name the structures labelled X and Y.
X. ________________________________... show full transcript
Worked Solution & Example Answer:The diagram shows the structure of a nephron and part of its associated blood supply - Leaving Cert Biology - Question 6 - 2018
Step 1
Name the structures labelled X and Y.
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Answer
X = Bowman’s capsule
Y = Distal (convoluted) tubule or DCT
Step 2
Draw a line from the ‘Target area’ box above, to a precise location on the diagram to indicate where the hormone ADH has its effect.
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Answer
Draw a line from the 'Target area' box to the distal convoluted tubule or collecting duct where ADH acts.
Step 3
Briefly describe the effect of ADH on its target area.
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Answer
ADH increases the permeability of the distal convoluted tubule and collecting duct to water, leading to more water reabsorption into the bloodstream.
Step 4
What change in blood composition triggers the secretion of ADH?
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Answer
An increase in salt concentration in the blood or a decrease in water concentration triggers the secretion of ADH.
Step 5
Name the endocrine gland in which ADH is produced.
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Answer
Hypothalamus (allow posterior pituitary)
Step 6
Suggest one possible treatment for kidney failure.
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Answer
Dialysis or transplant.
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