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.

Answered by Rehan J. Biology tutor

4743 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Describe the pathway of blood flow through the pulmonary circuit


What is the reflex arc and how does it protect us?


b)Plants can use the glucose they have made to supply them with energy. Give four other ways in which plants use the glucose they have made.


How is a leaf adapted for photosynthesis?


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 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences