Summary

Summary Pancreas and Blood Glucose Control

0 purchase

Course
Unit 5

Institution
OCR

Revision notes on the pancreas and blood glucose control. A level biology OCR A revision notes. Notes on module 5: Communication, homeostasis and energy. Summary/ information you need to memorize for a level biology OCR A exams. A* student's revision notes.

[Show more]

Preview 1 out of 3 pages

View example

Uploaded on December 4, 2023
Number of pages 3
Written in 2022/2023
Type Summary

pancreas
blood glucose
control
hormones
diabetes
islet of langerhans
beta cells
insulin
glucagon
glycogen
a level
biology
ocr a
homeostasis
communication
energy
revision notes

Study Level
A/AS Level
Examinator
OCR
Subject
Biology A
Unit
Unit 5

$10.36

Add to cart

Add to wishlist

100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached

Pancreas and Blood Glucose Control:
 The pancreas acts as both an endocrine and exocrine gland.
 The pancreas therefore contains endocrine and exocrine tissue.
 The endocrine tissue (Islet of Langerhans) contains beta cells
that secrete insulin and alpha cells that secrete glucagon and
has blood capillaries passing through for these hormones to be
secreted into.
 The exocrine tissue (Acinus) secretes pancreatic juice
containing enzymes (e.g. amylase, lipases, proteases) and bile
into the pancreatic duct.

 Insulin release:
1) The potassium channels into a beta cell are normally open,
whereas the calcium channels are normally closed.
2) Potassium ions diffuse out of the cell causing the inside to
become more negative (-70mV) than the outside.
3) As glucose concentrations outside of the cell increase,
glucose moves into the cell via diffusion.
4) Under the influence of the enzyme glucokinase, glucose is
metabolised to produce ATP.
5) The generation of extra ATP causes the potassium channels
to close.
6) The potassium ions now remain within the cell, and this
causes the inside to become less negative.
7) The insulin is packaged into vesicles and these vesicle move
towards the plasma membrane.
8) The vesicles fuse with the plasma membrane and release
insulin via exocytosis.
9) The insulin travels in the blood to the target cells.
 Insulin increases permeability of the plasma membrane to
glucose.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller flcarr23. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $10.36. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

68175 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling