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How does the collecting duct aid in the control of the concentration of urine?

When the concentration of urine is low, the blood will reabsorb more water from the collecting duct. This is via the action of ADH increasing the permeability of the collecting duct walls (via aquaporins). (...
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Answered by Claire P. • Biology tutor
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Describe the function of the Bowmans's capsule

The Bowman’s capsule, part of the filtration unit that removes glucose, salt, water, amino acids and urea out of the blood into the nephron.
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Answered by Claire P. • Biology tutor
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c) What does the rate of reaction depend on? (2 marks)

Collision frequency of reacting particles Energy transferred during the collision
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Answered by Claire P. • Chemistry tutor
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b) What 3 factors can increase the rate of reaction? (3 Marks)

b) A catalysis, increased temperature, increased concentrationb
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Answered by Claire P. • Chemistry tutor
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a) Complete the balanced symbol equations: (2 marks) H2SO4 + NaOH  HCl + Mg(OH)2 

H 2 SO 4 + 2NaOH --> 2H 2 O + Na 2 SO 4 2HCl + Mg(OH) 2 --> 2H 2 O + MgCl 2
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Answered by Claire P. • Chemistry tutor
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