100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Lipid Digestion and Absorption in the Gastrointestinal Tract £7.49   Add to cart
Quickly navigate to
Preview
  2.  
  3. University Of Surrey (UNIS)
  4.  
  5. Integration Of Physiological Systems (BMS2038)

Lecture notes

Lipid Digestion and Absorption in the Gastrointestinal Tract

 2 views  0 purchase

Provides a good base knowledge of how fats are digested throughout the GI system and how they are then absorbed. Introduces the different types of fat composition that are present within the GI tract, as well as introduces the role of key enzymes, e.g. lipase. and their role in digestion. Then star...

[Show more]

Preview 1 out of 4  pages

Document information

  • July 26, 2023
  • 4
  • 2020/2021
  • Lecture notes
  • Dr sarah bailey
  • All classes

Subjects

Written for

All documents for this subject (16)

Seller

avatar-seller
kathrynray

Content preview

Gastrointestinal Tract Lipid Digestion and Absorption

• COMPOSITION OF FAT ENTERING THE GI TRACT:

DIETARY (80-100G/DAY) ENDOGENOUS (BILE)
90% triacylglycerol (TAG) 10-15g phospholipid
5% phospholipids 1-2g cholesterol ester
0.5% cholesterol ester 6g intestinal cells
10g dead cells




• Minor digestion in the mouth and stomach
1. LIPID DIGESTION IS INITIATED IN THE MOUTH, LINGUAL LIPASE
• HYDROLYSIS of DIETARY FATS (TAG) with short and medium chain fatty acid (e.g. Milk, fat); some of
free fatty acid released
• It is not important nutritionally in humans
• Perception of fat taste

• LIPASE = a globular protein
• Unable to penetrate surface area of lipid particles
• SALIVARY LIPASE = active at low pH

• Minor lipid digestion
2. IN THE STOMACH, GASTRIC LIPASE (FUNDIC CHIEF CELL; limited action of TG hydrolysis
• GASTRIC MOTILITY = plays a crucial role in lipid digestion
• It is in the first stage in the process of emulsification (increase in surface area of lipids) for digestion

• EMULSIFICATION = the major process in fat digestion, breaking large droplets into smaller ones
• It BEGINS by AGITATION in the STOMACH to MIX the FAT with the PRODUCTS of DIGESTION




• Main dietary fat digestion and absorption occurs in the small intestine - Emulsification and digestion




1. Emulsification by bile salts and phospholipids
2. Breakdown the course emulsion into smaller and more stable particles
Integration of Physiological Systems Page 1

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

Quick and easy check-out

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

Focus on what matters

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 kathrynray. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £7.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

67866 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£7.49
  • (0)
  Add to cart