Proteins- Vital to Life

Proteins- Vital to Life PowerPoint PPT Presentation


  • 91 Views
  • Uploaded on
  • Presentation posted in: General

FON 241 Principles of Human Nutrition: Protein; L. Zienkewicz. Proteins:. Contains carbon, hydrogen, oxygen and nitrogen atoms. Provide energy: 4 kcal/gStructural component of cellsContributes to blood clotting, fluid balance, vision, cell growth and repair, etc.Composed of amino acids (AA's).

Download Presentation

Proteins- Vital to Life

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


1. FON 241 Principles of Human Nutrition: Protein; L. Zienkewicz Proteins- Vital to Life Chapter 6

2. FON 241 Principles of Human Nutrition: Protein; L. Zienkewicz Proteins: Contains carbon, hydrogen, oxygen and nitrogen atoms. Provide energy: 4 kcal/g Structural component of cells Contributes to blood clotting, fluid balance, vision, cell growth and repair, etc. Composed of amino acids (AA’s) The nitrogen atom in protein makes it unique from the other macronutrients. Some amino acids even contain sulfer. Almost all of the amino acids are all made by plants. By combining N from the soil with C from eth air, along with other elements, plants form amino acids. Humans consume nutrigen in the form of AA’s via protein containing foods. The nitrogen atom in protein makes it unique from the other macronutrients. Some amino acids even contain sulfer. Almost all of the amino acids are all made by plants. By combining N from the soil with C from eth air, along with other elements, plants form amino acids. Humans consume nutrigen in the form of AA’s via protein containing foods.

3. FON 241 Principles of Human Nutrition: Protein; L. Zienkewicz Functions of Protein: 1. Structure to body parts: muscle, tissue, bone development. 2. Body function: clotting factors, etc. 3. Maintains fluid balance: effects blood pressure. 4. Contributes to Acid-base balance. 5. Forms hormones and enzymes. 6. Contributes to immune function. 7. Forms glucose: gluconeogenesis. 8. Energy: 4kcal/g. The body is constantly rebuilding itself. In that process, proteins are broken down into amino acids and added to the pool of amino acids available for protein synthesis. Some proteins are not reused, so they are essentially lost, not recycled. If a person fails to eat a diet adequate in protein, the protein rebuilding and repairing process slows. For body growth and maintenance, adequate dietary protein must be supplied. If adequate protein is not given in the diet, the major organs and skeletal muscle will decrease in size or amount. Thus, the body will breakdown itself to get adequate protein. Only the brain resists breakdown. Blood proteins attract and retain fluid, thus retaining blood pressure. Not consuming enough protein will decrease the amount of protein in the blood. When this happens, the amount of protein in the blood decreases. Blood pressure can force fluid out of the vessels and into the extracellular space. Edema results. Children with sever protein, calorie malnutrition often show severe edema. Acid base balance- keeps the pH of the blood steady 7.35-7.45, slightly alkaline. Blood proteins act as buffers in the blood. Immune function: antibodies are proteins. AA’s are metabolized into glucose if there is not an adequate supply of CHO in the diet: GluconeogenesisThe body is constantly rebuilding itself. In that process, proteins are broken down into amino acids and added to the pool of amino acids available for protein synthesis. Some proteins are not reused, so they are essentially lost, not recycled. If a person fails to eat a diet adequate in protein, the protein rebuilding and repairing process slows. For body growth and maintenance, adequate dietary protein must be supplied. If adequate protein is not given in the diet, the major organs and skeletal muscle will decrease in size or amount. Thus, the body will breakdown itself to get adequate protein. Only the brain resists breakdown. Blood proteins attract and retain fluid, thus retaining blood pressure. Not consuming enough protein will decrease the amount of protein in the blood. When this happens, the amount of protein in the blood decreases. Blood pressure can force fluid out of the vessels and into the extracellular space. Edema results. Children with sever protein, calorie malnutrition often show severe edema. Acid base balance- keeps the pH of the blood steady 7.35-7.45, slightly alkaline. Blood proteins act as buffers in the blood. Immune function: antibodies are proteins. AA’s are metabolized into glucose if there is not an adequate supply of CHO in the diet: Gluconeogenesis

4. FON 241 Principles of Human Nutrition: Protein; L. Zienkewicz Functions of Proteins: Enzymes in the body Structural units Transport systems Immune constituents Regulatory factors ** In order to use proteins for synthesis in our body, we must consume adequate energy. If we do not consume enough energy, our body will break down dietary protein for an energy source. Thus, if we don’t consume adequate energy, protein cannot do its job.

  • Login