MYTUTOR SUBJECT ANSWERS

621 views

How are blood glucose levels controlled in the body?

Blood glucose is controlled by a negative feedback mechanism. 

When blood glucose levels rise, this is detected by beta cells in the Islets of Langerhans in the pancreas. In response, they secrete insulin which opens glucose channels in the membranes of cells (especially skeletal muscle and lievr cells) to allow glucose in so blood level decreases. It also casues rate of respiration to increase and the hepatocytes (liver cells) are stimulated to do glygogenesis. This is the storing of glucose as glycogen in order to reduce blood glucose level.

When blood glucose level falls to low this is detected by the alpha cells also in the Islets of Langerhans. In response they secrete glucagon into the blood which has an opposite effect to insulin. It decreases the cells permeability to glucose so it can remain in the blood. It also stimulates the hepatocytes to do glycogenolysis (the hydrolysis of glycogen to glucose) and gluconeogenesis (the production of glucose from fatty acids, glycerol and amino acids). These responses lead to an increase in blood glucose.

Emily K. GCSE Biology tutor, A Level Biology tutor, GCSE Maths tutor

2 years ago

Answered by Emily, an A Level Biology tutor with MyTutor


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

175 SUBJECT SPECIALISTS

£22 /hr

Corey C.

Degree: Medicine (Bachelors) - Newcastle University

Subjects offered:Biology, .UKCAT.+ 1 more

Biology
.UKCAT.
-Medical School Preparation-

“I am 21 years old and currently in my 3rd Year of Medical School at Newcastle University. I have a natural love for science and I am enthusiastic about teaching others, with previous experience of tutoring students. I am also availabl...”

£20 /hr

Odette F.

Degree: Biological Sciences (Bachelors) - Exeter University

Subjects offered:Biology, Geography+ 1 more

Biology
Geography
-Personal Statements-

“ABOUT ME: I am a 2nd Year Biology Student at the University of Exeter. Science as a whole, is a subject I am hugelyenthusiastic about and I would love to share this eagernesswith you! Having spent some of my Gap Year teaching abroad, I...”

£20 /hr

Holly S.

Degree: Bachelor of Dental Surgery (Bachelors) - Glasgow University

Subjects offered:Biology, Maths

Biology
Maths

“Hi! I am studying Dentistry at the University of Glasgow, and have an in-depth knowledge and keen interest in the sciences and maths (and teeth!). ”

MyTutor guarantee

About the author

Emily K.

Currently unavailable: until 01/06/2016

Degree: Medicine with Foundation Year (Other) - Manchester University

Subjects offered:Biology, Maths

Biology
Maths

“About Me: I am a first year Medicine student. I really enjoyed studying Biology and Maths at A Level so would love to share my knowledge and help you to enjoy these subjects if you don’t already! I have a cheerful, patient and calm p...”

MyTutor guarantee

You may also like...

Other A Level Biology questions

What is DNA replication and how does the cell cycle regulate cell division?

Why is the genetic code described as being universal?

How does a plant respond to light?

What is the difference between competitive and non-competitive inhibition of enzymes?

View A Level 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

mtw:mercury1:status:ok