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Nutrition in Man

Nutrition in Man. Small intestine (Duodenum). Let’s Recap!. Prepare your whiteboards!. Let’s Recap!. Name the three parts of the small intestine. Let’s Recap!. Name the three parts of the small intestine Duodenum Jejunum Ileum. Let’s Recap!.

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Nutrition in Man

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  1. Nutrition in Man Small intestine (Duodenum)

  2. Let’s Recap! • Prepare your whiteboards!

  3. Let’s Recap! • Name the three parts of the small intestine

  4. Let’s Recap! • Name the three parts of the small intestine • Duodenum • Jejunum • Ileum

  5. Let’s Recap! • Name the three secretions found in the duodenum

  6. Let’s Recap! • Name the three secretions found in the duodenum • Intestinal Juice • Pancreatic Juice • Bile

  7. Lesson Objectives • To state the 3 secretions found in the small intestine and describe the enzymatic reaction that takes place in the duodenum. • To understand some of the answering techniques in Science (Biology) questions: • Graphing techniques in science • Task words

  8. Let’s Recall • The 3 secretions: • Intestinal Juice • Pancreatic Juice • Bile (no enzymes)

  9. Small intestine

  10. Small intestine

  11. Small intestine Carbohydrate digestion

  12. Small intestine Protein digestion • Some digested in the stomach • Undigested proteins enter small intestine • Converted to polypeptides by protease (trypsin)

  13. Small intestine Fat digestion • Bile emulsifies fats and breaks them up into minute fat globules • Enlarges surface area of fats • Speed up digestion • End products are fatty acids and glycerol

  14. Diagram for fat emulsification big drop of fat tiny fat droplets bile salts +

  15. Answering techniques Graphing in Science

  16. Graph • Plot a graph (it can be a straight line or a curve depending on your plots) accurately in pencil only.

  17. Graph • Give an appropriate title to the graph. Example : Graph of rate of reaction against temperature

  18. Graph • Check that you have gotten the x- and y-axis correct. E.g. Plot a graph of rate of bubbling against light intensity: the rate of bubbling takes the y-axis and the light intensity takes the x-axis.

  19. Graph • Label the axes clearly and include units for each axis if applicable.

  20. Graph • Use appropriate scale for both axes. • It is alright not to start at zero for both axes if you wish to stretch the curve in order to maximize the space on the graph paper. (3/4 of the space provided)

  21. Graph • Draw a best-fit curve. Use a flexible curve / free hand for drawing a curve and a ruler for drawing a straight line. • Try your best to pass the curve / straight line through as many points as possible. (Note: The term ‘curve’ used in plotting of graph in biology can mean an actual curve or a straight line.)

  22. Graph • Do not extrapolate the curve beyond the first and last point.

  23. Task words Words that tell you what you need to do

  24. List of task words Outline Suggest Illustrate Name / Identify Discuss Distinguish • Define • State • List • Describe • Explain / Account

  25. Muddiest Point

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