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Grade 11 CAPS 2013 Flipped classroom Gerry Noel

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1 Grade 11 CAPS 2013 Flipped classroom Gerry Noel
Human Nutrition Grade 11 CAPS 2013 Flipped classroom Gerry Noel

2 INTRODUCTION Grade 11 Human Nutrition for 2013 Flipped classroom?

3 Flipped Classroom advantages…

4 What I want you to do? Make your own life sized poster on the Human Digestive System: Journey of BIG MACromolecules to Smaller molecules. 4 Parts to this journey (make sure you have the 4 hand outs and mark schemes) Structure and Function (Group) Digestive Processes (Group) Chemistry of Life (Extension work for group) Digestive Processes (Individual) Textbook: Shuters Top Class Life Sciences, Grade 11 (2012).

5 Let’s get the show on the road!
Read over all the instructions first! Make sure you’ve read and understood the mark scheme.

6 Animal Nutrition Food gives organisms energy for all cellular functions. Producers/autotrophs Consumers/heterotrophs: Herbivores Carnivores Omnivores

7 Part 1: Structure and Function Overview
Eyes, Nose and tongue Mouth and teeth Oesophagus Stomach Small Intestine (duodenum, jejunum and ileum) Colon/Large Intestine Rectum and anus Salivary glands Liver and gall bladder Pancreas Click movie icon to start Introduction to Digestion Video!

8 Sensing food and the mouth, tongue and teeth
All starts with the senses in the body! Mouth: Beginning of the Big Mac’s journey Tongue and teeth inside the mouth Tongue tastes food and helps you swallow Teeth break up food into smaller pieces = mechanical digestion/mastication 3 pairs of salivary glands that produce saliva: Water, slippery mucin and enzymes (lysozyme and salivary amylase) Helps to form bolus and lubricate it for swallowing Sense of taste and smell video Teeth video

9 Structure: Teeth 4 types: Humans Incisors canines premolars Molars
2:1:2:3 Textbook Pg 123 & 131 Q1:Which set of teeth belongs to which type of consumer and give reasons why?

10 Passed the pharynx, through the oesophagus
Pharynx (throat): Muscular part at the back of mouth Opens to trachea (to the lungs) and oesophagus (to the stomach) Oesophagus: Narrow muscular tube Bolus moves down through contraction and relaxation of muscles in process called = PERISTALSIS Q2:Can you think of other examples in the body where peristalsis is used to move things? Textbook Pg 133

11 Into the stomach Large ‘bag’ that receives and holds food.
At each end of the stomach there are valves called sphincters that control the movement of food; Cardiac sphincter at the top end pyloric sphincter at the bottom end Cells lining the stomach secrete gastric juice. Hydrochloric acid (HCl), low pH Mucus, high pH Proteases, (pepsinogen) Alcohol, Vit B12 and aspirin are absorbed. Food leaves the stomach as chyme. Stomach video

12 Into the not so… small intestine
Soupy chyme enters small intestine. Folded tube (5 -7m long) Lined with columnar epithelial cells 3 parts: Duodenum Jejunum Ileum Duodenum has Brunner’s glands which secrete alkaline rich mucus; Neutralise Chyme Provide right pH for enzymes Lubrication Digestion of food is completed so that simple soluble nutrients can be absorbed. Carbohydrates, fats and proteins are digested Most digested food absorbed Small intestine video

13 Large intestine Large intestine/colon stretches like a frame around the small intestine. Main functions: Absorb water, dissolved minerals and vitamins Helped by over 700 species of bacteria (gut flora) Caecum and appendix are two structures where small intestine joins large intestine; No digestive function but contain tissue from the immune system Very large in organisms that digest cellulose Rectum is short tube at end of large intestine; Stores indigestible remains for short time before being expelled At the opening end of rectum is anus; Surrounded by sphincter muscles to help control movement of faeces Large intestine video

14 Associated glands: Salivary Glands and Pancreas
3 salivary glands that secrete saliva. Pancreas that secretes pancreatic juice. Travels down duct into duodenum (exocrine gland) Contains enzymes for breaking down food Carbohydrases: starch maltose Proteases: proteins amino acids Lipases: lipids fatty acids and glycerol Contains alkaline salts for neutralising acidic chyme Pancreas controls blood sugar levels by secreting hormones insulin and glucagon (endocrine gland).

15 Associated glands: Liver
Largest gland and solid organ in the body. Liver has many functions: Secretes bile which is stored in gall bladder. Bile neutralises acidic chyme Emulsifies fats into small droplets Controls release of glucose in blood by converting glucose glycogen. Controls excessive amino acid concentrations in the body through deamination. Process where amine group is removed from amino acid producing a carbohydrate and urea. Transports both glucose and amino acids if necessary via hepatic vein (vessel from liver to heart) to the heart and then to cells of the body. Store vitamins and minerals (if not needed pass out through urine). Alcohol and drugs are transported via hepatic portal vein (vessel from small intestine or stomach to the liver) to be metabolised. Liver fact pack

16 Get on with Part 1…

17 Part 1: Structure and Function
Textbook page 125

18 Other possible human nutrition tasks
Food diary - Analyse nutritional information packaging Dietary supplements for sport analysis

19 Cultural and socio-economic influences on diet
Italy: The Manzo family of Sicily R 1976 per week

20 Germany: The Melander family of Bargteheide
R 3712 per week

21 United States: The Revis family of North Carolina.
R 2538 per week

22 Mexico: The Casales family of Cuernavaca
R 1403 per week

23 Poland: The Sobczynscy family of Konstancin-Jeziorna
R 1123 per week

24 R 507 per week Egypt: The Ahmed family of Cairo

25 Ecuador: The Ayme family of Tingo
R 234 per week

26 Bhutan: The Namgay family of Shingkhey Village
R 37 per week

27 Chad: The Aboubakar family of Breidjing Camp
R 9.13 per week

28 Thank you gnoel@bishops.org.za


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