IB Excretion Extended Response
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The diagram shows a nephron from a mammal.
(a.i) Identify structure X. [1]
The diagram shows a nephron from a mammal.
(a.ii) Identify structure Y. [1]
The diagram shows a nephron from a mammal.
(b) State the region of the kidney in which the loop of Henle is situated. [1]
The diagram shows a nephron from a mammal.
(c) Explain the role of the hormone ADH in osmoregulation. [2]
(a) Label region X and structure Y on the diagram of the kidney. [2]
(b) Distinguish between osmoregulators and osmoconformers. [2]
Explain how water balance is restored in mammals when they are dehydrated. [7]
(a) Humans need to balance water and solute concentrations and also excrete nitrogenous wastes. Explain how the different parts of the kidney carry out these processes. [7]
(b) Describe adaptations in mammals living in desert ecosystems to maintain osmolarity in their bodies. [4]
Explain the role of the kidney in osmoregulation. [8]
Outline the reasons for the differences in blood concentrations between the renal artery and the renal vein. [4]
Explain how blood solute concentrations are kept within narrow limits in the human body. [7]
Antidiuretic hormone is a peptide hormone that is produced in the hypothalamus. Explain its action in the human body. [8]
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Flashcards (39)