A-Level Biology AQA 7402

6.4.3: Control of blood water potential

#6.4.3.1

Osmoregulation as control of the water potential of the blood.

#6.4.3.2

The roles of the hypothalamus, posterior pituitary and antidiuretic hormone (ADH) in osmoregulation.

#6.4.3.3

The structure of the nephron and its role in:

  • the formation of glomerular filtrate
  • reabsorption of glucose and water by the proximal convoluted tubule
  • maintaining a gradient of sodium ions in the medulla by the loop of Henle
  • reabsorption of water by the distal convoluted tubule and collecting ducts.
6.4.2
Control of blood glucose concentration
7.1
Inheritance
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