• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Digestion: Fact sheet.

Extracts from this document...

Introduction

Digestion: Fact sheet Introduction Digestion means that large food molecules are broken down into smaller ones, which can be dissolved and broken down into food group such as: * Proteins * Fats * Starch * Carbohydrate's * Vitamins * Minerals * Fibres This all happens inside the gut where food is mixed with enzymes. Proteins, Fats and Carbohydrates have to be digested before the body can use them because they're made of large complicated molecules. Once they've been digested they're small enough to pass through the gut wall and into the blood this is called absorption. Vitamins and minerals don't have to be digested because they're small enough to pass through the gut wall and into the blood. Fibre can't be digested because humans don't make the right enzymes for this to take place. And the molecules are too big to pass through the gut wall so it stays inside the gut and makes up most of the faeces. (Below is a example of how enzymes breakdown food molecules) ...read more.

Middle

Food groups What does it do? Found in... Carbohydrate's It gives us energy (acts as a fuel in respiration). Sugary Foods. E.g. Sweets, Soft Drinks, Starch Foods. E.g. Bread, Potato, Rice, Pasta Protein Make new cells E.g. For growth and repair. Meat, Fish, Eggs, Milk, Cheese, Beans and nuts. Fat Gives energy and acts as a fuel in respiration. Fried Foods, E.g. Chips, Crisps, Butter, Margarine, Cheese, Nuts, Chocolate, Red Meat. Vitamins E.g. Vitamin C E.g. Vitamin D Keeps the body healthy. Keeps the skin and gums healthy. Keeps the bones and the teeth healthy. Oranges, Blackcurrants, Potatoes, Green Vegetables. Fish, Eggs, Liver. Minerals E.g. Iron E.g. Calcium Keeps the body healthy. Makes red blood cells. Keeps bones and teeth healthy. Red Meat, Green Vegetables, Cocoa. Wholemeal Bread, pasta, Brown Rice, Fruit, Vegetables. Fibre Keeps the gut healthy and helps to avoid constipation. (Having trouble with egesting) Wholemeal Bread and Pasta, Brown Rice, Fruit, Vegetables Starch Glucose (Polysaccharide) Fats Amino Acids (Energy store, Insulation, cell membrane) * Glycerol * Fatty acids Protein Amino Acids (Growing) ...read more.

Conclusion

E.g. Carbohydrates changed into fats, and minerals stored. It makes bile for breakdown of fats and destroys poisons like alcohol and drugs. The excess protein is made into Urea in the liver. It also contains stored Carbohydrates, which are used to keep the blood sugar level steady. Large Intestine Once food reaches the large intestine all useful substances have been digested and absorbed, so only the faeces remain. As they pass through the large intestine water is absorbed and faeces is stored inside the rectum before being pushed outside the body through the anus. Describing absorption (Conclusion) Absorption is when small food molecules move through the gut wall and into the blood. E.g. Proteins, Carbohydrates, and Fats. Which have to be digested before they can be absorbed, but some are by now small and don't require to be digested. E.g. Vitamins, minerals, and various sugars. Absorption occurs in the Ileum (Small intestine). The finger like spikes called the Villi; provide surface area to enlarge the effectiveness of absorption. Food is absorbed into the blood, and then it is taken straight to the liver to be processed into food groups. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Food Technology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Food Technology essays

  1. Structure and function of the digestive system.

    Food absorption takes place mainly in the ileum and is done so through the gut lining. There are folds in the inner surface of the wall here where villi are present. Lining the villi are microvilli on the surface membrane of epithelial cells, which absorb amino acids, monosacharides, fatty acids, glycerol, water, vitamins, nucleic acid, ions and trace elements.

  2. Mechanisms of Digestion

    It needs to be at a low PH to work. * Lipase- This digests fats and oils, and turns them into fatty acids and glycerol. The enzymes are what turn the food into nutrients. Without them food wouldn't be turned into nutrients and we would not benefit from getting any

  1. acrylamide in crisps and chips

    Fried food risk French fries sold at Swedish franchises of US fast-food chains contained about 100 times the one microgram per litre maximum permitted by the WHO in drinking water, the study showed. One milligram, or 0.001 gram, contains 1,000 micrograms.

  2. What makes a balanced diet?

    To avoid thus, pregnant women are advised not to eat food such p�t�'s and blue-veined and soft cheeses, because high levels of bacteria have been found in these foods. There is no risk associated with hard cheeses such as Cheddar of Cheshire, or cottage cheese, processed cheese or cheese spread.

  1. Nutrients are split into two main groups, the macronutrients which contains carbohydrates, fats and ...

    * Polyunsaturated fatty acids A fatty acid is made up of carbon atoms with an acid group (COOH) at one end and a methyl group (CH ) at the other. The structure of the chains of fatty acids attached to the glycerol molecule will show whether the fat is classed as saturated, monounsaturated or polyunsaturated.

  2. The pathway of food molecules through the alimentary canal and the process of their ...

    Food stays in the stomach for as long as 40 minutes and fatty meals remain there longer. Specialised groups of cells in the gastric pits in the mucosa secrete gastric juices. Each type of cell here produces a specific secretion.

  1. What are the main functions in digestion of thea) ...

    What is peristalsis and where does it occur? Peristalsis is the process of food being propelled downwards, this takes place in the oesophagus. Peristalsis is muscular contractions that squeeze and relax the walls of the oesophagus. Briefly describe the process of digestion from ingestion of food to the elimination of waste The mouth takes in the food and

  2. We are encouraged to consume 4-6 portions of fruit and vegetables each day. Investigate ...

    Also it would take too long to analyze more than 25. 5. Carry out two pilot tests - I will give two questionnaires too two friends to be sure the questions make sense, they will supply me with the correct information I need and to make sure that there are no spelling mistakes.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work