1 / 36

Biology Journal 10/1/2013

Biology Journal 10/1/2013. What kind of reaction is shown? Write out the reaction as words: Sucrose + _______ → ________ + _______ 3. When might this reaction be happing in your life?. →. +. +. H 2 O. Biology Journal 10/1/2013.

gelsey
Download Presentation

Biology Journal 10/1/2013

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Biology Journal 10/1/2013 What kind of reaction is shown? Write out the reaction as words: Sucrose + _______ → ________ + _______ 3. When might this reaction be happing in your life? → + + H2O

  2. Biology Journal 10/1/2013 What kind of reaction is shown? Decomposition through hydrolysis Write out the reaction as words: see below 3. When might this reaction be happing in your life? This happens whenever you eat sucrose (sugar)! → + + H2O sucrose + water → fructose + glucose We will now learn how the digestive system makes this happen!

  3. What do the parts in the picture represent? A = B = C = D = E = Substrate Enzyme Active site Enzyme-substrate complex Products What kind of reaction is happening in this picture? Decomposition

  4. Enzymes (almost)always end in what 3 letters? ASE

  5. Large food molecules need to be digested or catabolized (broken down by an enzyme –usually hydrolysis) before the nutrients can be absorbed. • Reactants are: • Big (too big to be absorbed into a cell) • Usually insoluble • Products are: • Small enough to be absorbed into a cell • Usually soluble

  6. What could be a null hypothesis for the toothpickase lab we just did?

  7. How will you test the null hypothesis to see if it is supported or not supported?

  8. What could we do for Aspect 2: processing raw data?

  9. Biology Journal 10/2/2013 Complete the table!

  10. Biology Journal 10/2/2013

  11. Biology Journal 10/2/2013 What order are these organs encountered in the digestive tract (from mouth to anus)? Put them in the correct sequence. Mouth Large intestine Small intestine Colon Stomach Esophagus Liver Anus Pancreas

  12. Biology Journal 10/2/2013 What order are these organs encountered in the digestive tract (from mouth to anus)? Put them in the correct sequence. Mouth Esophagus Stomach Small intestine Liver and Pancreas Large intestine Colon Anus

  13. Biology Journal 10/4/2013 Complete the table!

  14. Biology Journal 10/4/2013

  15. X-ray scan of a house cat being digested by a python.

  16. Biology Journal What is activation energy? What do enzymes do to activation energy? Activation energy is the energy input required to make a reaction happen. Enzymes lower the activation energy of a reaction, thus it’s faster!

  17. Stomach • Has a pH of 2 (because of HCl) • pH kills almost all bacteria, viruses and denatures proteins • Contains pepsin (a protease whose optimum pH is 2) • Stretch-receptors trigger release of enzymes

  18. So, based on that, do you think that the 5 second rule is valid?

  19. Small Intestine • Absorbs molecules through villi • Long! (around 7 meters (23 feet) long)

  20. Small Intestine • Liver and Pancreas add enzymes to finish breaking down food • Bile ducts and pancreatic duct meet up and transfer bile and enzymes to duodenum

  21. Small Intestine • Villi are finger-like projections that maximize surface area for absorption of molecules.

  22. Villi are like a bath towel. The more surface area, the faster and more efficient the absorption.

  23. Molecules are absorbed by villi, meaning the nutrients pass from the gut into the blood. These molecules are assimilatedby cells, meaning cells take the molecules and integrate them into themselves.

  24. Large Intestine • Absorbs water from food (not nutrients) • Has large stores of bacteria

  25. How does diarrhea help cure you from an illness? • During diarrhea, the small intestine stops absorbing water and instead attempts to purge all contents of digestive system.

More Related