What is homeostasis?

Homeostasis is the maintenance of the internal environment to a constant state, despite changes to the external environment. Examples of conditions in the body which must be kept constant include body temperature, blood glucose concentration and carbon dioxide concentration.

Homeostasis is achieved by the body using negative feedback. This is the reversal of a change in the body's internal environment to an optimum level. On a basic level, negative feedback takes place via a standard pathway:

Stimulus --> Receptor --> Communication pathway (cell signalling) --> Effector --> Response

GW
Answered by George W. Biology tutor

6122 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Starting with mRNA in the cytoplasm, how are polypeptides produced?


mRNA is used during translation to form polypeptides. Describe how mRNA is produced in the nucleus of a cell. (6)


Describe how glucose is transported into epithelial cells in the ileum


How do the alveoli within the lungs create an efficient gas exchange surface?


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences