6 Protein - Enzymes, Hormones, and Body Building Lecture 6...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
PROTEIN Enzymes, Hormones,  and Body Building Lecture 6 February 11, 2008 Dr. Hirsch
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Depar t ment of Food Sci ence Lect ur e 5: Feb 11, 2008 Food & Health 400:104 Lecture 5 Six Classes of Nutrients 1. Carbohydrate 2. Protein 3. Fat 4. Vitamins  5. Minerals  6. Water
Background image of page 2
Depar t ment of Food Sci ence Lect ur e 5: Feb 11, 2008 Food & Health 400:104 Lecture 5 Protein Outline Function in Body Structure Intake/Consumption Quality Protein and Health Function in Foods
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Depar t ment of Food Sci ence Lect ur e 5: Feb 11, 2008 Food & Health 400:104 Lecture 5 The word “protein” Derived from the Greek word  proteios , which means “of the  first rank” Coined by Jon Berzelius Swedish chemist discovered that an extract of potatoes is more effective than concentrated sulfuric acid in promoting the breakdown of starch
Background image of page 4
Depar t ment of Food Sci ence Lect ur e 5: Feb 11, 2008 Food & Health 400:104 Lecture 5 Functions of Body Proteins No living tissue can be built without protein Protein is part of every living cell Proteins account for ~ 20% of body weight Proteins come in many forms and perform many vital functions
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Depar t ment of Food Sci ence Lect ur e 5: Feb 11, 2008 Food & Health 400:104 Lecture 5 Biological Proteins   Biological Processing Enzymes  – over 2000 – catalyze reactions Hormones  – regulate metabolic reactions insulin and adrenaline Immune functions antibodies (immunoglobulins)   Transport and Storage  hemoglobin, myoglobin, gliadin, zein   Structural for Mechanical Support keratin, collagen, elastin Examples of body structures include skin, hair, nails, membranes, muscles, teeth, bones,  organs, ligaments and tendons.   Contractile (Muscle proteins) myosin, actin, tubulin
Background image of page 6
Depar t ment of Food Sci ence Lect ur e 5: Feb 11, 2008 Food & Health 400:104 Lecture 5 Protein As Energy In the absence of adequate energy, the body will sacrifice protein  to provide energy The amine group will be degraded, incorporated by the liver into  urea , and sent to the kidneys for excretion in urine Urea :  the principal nitrogen excretion product of metabolism
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Depar t ment of Food Sci ence Lect ur e 5: Feb 11, 2008 Food & Health 400:104 Lecture 5 Proteins Objective for Digestion:   Breakdown to amino acids Structure Building Blocks =Amino Acids Connected via Peptide Bonds Where: Mouth Stomach (to some extent) Small Intestine Amino acids Peptide Bonds
Background image of page 8
Depar t ment of Food Sci ence Lect ur e 5: Feb 11, 2008 Food & Health 400:104 Lecture 5 How the Body Handles Protein By the time proteins slip into the  small intestine, they are already  broken into different-sized pieces.
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 34

6 Protein - Enzymes, Hormones, and Body Building Lecture 6...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online