Describe how low blood water levels are controlled in the human body. (5 marks)

Changes in blood water levels are detected by the hypothalamus through the negative feedback mechanism in homeostasis (2 marks). The pituitary gland releases anti-diuretic hormone into the bloodstream as a result (1 mark) and binds to the receptors on the cells of the collecting duct (of the nephron) (1 mark). The collecting duct becomes more permeable (1 mark) and water moves out of the collecting duct and into the blood by osmosis (1 mark).
N.B. Do not accept answer for high blood water levelsWords in brackets not required.

RJ
Answered by Rehan J. Biology tutor

5680 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Name 5 components of the cell


Explain how evolution by natural selection brings about changes in a species ?


Describe the 'reflex arc'


What does an organism use energy from respiration for?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning