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Homeostasis is the maintenance of a stable internal environment (A-level only)

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Question 10
a.

Name the endocrine gland that secretes antidiuretic hormone (ADH) into the blood in response to stimulation from osmoreceptors.

[1]
b.

Cranial diabetes insipidus is a physiological disorder characterised by a severe deficiency in the secretion of ADH. Suggest two clinical signs or physiological changes in the urine or blood of a patient with this condition.

[3]
c.

Explain the cellular mechanism by which ADH increases the permeability of the collecting duct cells to water once it has bound to its specific receptors.

[3]

Homeostasis is the maintenance of a stable internal environment (A-level only) Questions

  1. A Level
  2. /Biology
  3. /Homeostasis is the maintenance of a stable internal environment (A-level only)