What is homeostasis?

Homeostasis is defined as the maintenance of a constant internal environment in the body. 

An example of this would be the blood glucose level:

After a meal, a person's blood glucose level would be high. This stimulates the beta cells of the islets of Langerhans in the pancreas to secrete insulin, an enzyme that converts glucose to glycogen to be stored in the liver. This then reduces the blood glucose level back to the norm. 

On the other hand, when a person's blood glucose level is low, such as after exercising, the alpha cells of the islets of Langerhans secrete glucagon, an enzyme that is responsible for converting glycogen to glucose and releasing it into the bloodstream, in order to increase the blood glucose level. 

This is an example of negative feedback (an important regulatory mechanism in the body). 

Lauren S. GCSE Biology tutor, A Level Biology tutor, GCSE Chemistry t...

2 years ago

Answered by Lauren, a GCSE Biology tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist


£18 /hr

Katie D.

Degree: Biomedical Science (Bachelors) - Durham University

Subjects offered:Biology


“Hello, I am just a genuine, patient, friendly person who wants to help other struggling students to understand, enjoy and hopefully succeed in biology.”

£24 /hr

Karolina K.

Degree: Dentistry (Bachelors) - Kings, London University

Subjects offered:Biology, Science+ 5 more

-Personal Statements-
-Medical School Preparation-

“Hi, my name is Karolina and I am a Dentistry Student from King's College London.  I understand that many students find certain aspects of the A-level syllabus challenging and having recently completed mine I believe that I know how to...”

Nehemie M. A Level Biology tutor, GCSE Biology tutor, IB French tutor...
£18 /hr

Nehemie M.

Degree: Biochemistry with a Professional Placement (Bachelors) - Bath University

Subjects offered:Biology, French


“I am university student passionate about Biology and Chemistry who also speaks French!!!”

About the author

£18 /hr

Lauren S.

Degree: BSc Biomedical Sciences (Bachelors) - University College London University

Subjects offered:Biology, Maths+ 3 more

-Personal Statements-

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

MyTutor guarantee

You may also like...

Other GCSE Biology questions

What is the difference between sexual reproduction and asexual reproduction?

How do the structure of phospholipids contribute to their positioning in the cell plasma membrane?

describe how the plant hormone auxin and light affects the direction of growth of plants

What is the difference between a gene, a chromosome and DNA?

View GCSE Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss