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

5280 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What are the main differences between mitosis and meiosis?


How do the offspring formed from asexual and sexual reproduction differ? Make sure to describe both processes in your answer.


Describe how water moves from the soil into a root hair cell


How does a vaccine work?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences