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

Liver Lab

Extracts from this document...

Introduction

LIVER Introduction The adult human liver normally weighs between 3 - 6 pounds; it is a soft, pinkish-brown boomerang shaped organ. It is the second largest organ and the largest gland in the human body. Its position in the body is right under the ribcage on the right side of the upper abdomen. The liver lies on the right of the stomach and makes a kind of cradle for the gallbladder. The liver has four important jobs, production of bile to help digestion, cleaning up toxic substances and dead cells (detoxification), storing essential proteins, carbohydrates, vitamins and minerals (metabolism), and production of essential proteins and substances required for body functions. Food is made up of carbohydrates, proteins, fats, vitamins and minerals. When we eat, food enters the stomach where the important phase of digestion occurs. Then the food passes on to small intestine where the main work of digestion takes place with the help of liver. Liver makes bile and digestive enzymes, special proteins that help to break down food to give energy. Bile is made by liver but is stored in gall bladder. Many waste products are unseen by bile before leaving the body as body waste. In metabolism liver cells store carbohydrate as glycogen, which either comes straight from diet or is made from other sources of food. ...read more.

Middle

--> Slowest If the liver enzyme was put into H2O2 at 25�C, then the mixture would bubble until the liver enzyme disappears. --> Slow If the liver enzyme was put into H2O2 at 40�C, then the mixture would bubble so much the liver enzyme would bubble right out of the test tube. --> Fast If the liver enzyme was put into H2O2 at 65�C, then the mixture would explode blowing the enzyme right out of the test tube. --> Fastest Materials 1. -5�C liver 2. 25�C liver 3. 40�C liver 4. 65�C liver 5. Test tube 6. H2O2 7. Stick 8. Paper Experiment **Make four round paper disks (the small round remains from whole puncher)** Put -5�C liver on the paper disk then push it down to the bottom of the H2O2 filled test tube. Calculate the time that it takes to rise up, also record the rise motion and H2O2 reaction. Put 25�C liver on the paper disk then push it down to the bottom of the H2O2 filled test tube. Calculate the time that it takes to rise up, also record the rise motion and H2O2 reaction. Put 40�C liver on the paper disk then push it down to the bottom of the H2O2 filled test tube. Calculate the time that it takes to rise up, also record the rise motion and H2O2 reaction. ...read more.

Conclusion

Mt hypothesis that stated, if the liver enzyme was put into H2O2 at 65�C, then the mixture would explode blowing the disk right out of the test tube, was true. The reaction at this temperature was apparent even before the disk got a quarter of the way down the tube. It took us forever to get the disk to the bottom of the tube, because the hydrogen peroxide kept oozing out as the liver touched it. Liver enzymes reactions slow down and last longer when they are in acidic medium. But on the other hand, enzymes reactions are faster in basic medium, but still last longer. The best reaction is at about a neutral pH on its own environment of liver, it is a quick time very rapid reaction. This experiment that I constructed showed the speeds of enzymes at various temperatures. The cold enzymes reacted slowly with the acidic hydrogen peroxide. And the hot enzymes reacted very quick and rapidly with the acidic hydrogen peroxide. What if we weren't using acidic stuff like hydrogen peroxide, and instead we were using a basic medium. My hypothesis is that the cold enzyme would be crazy fast, and the hot would be unimaginable. I think this experiment shows what happens to food we eat, because your livers enzymes have to clean and help digest what we eat. So if we eat acidic food enzymes have to work harder, than when we eat basic food; and when we eat food of neutral pH the enzymes have a better medium for reactions. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology 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 International Baccalaureate Biology essays

  1. Vitamin C Lab

    From the burette, slowly release the DCPIP drop by drop into the conical flask with lemon juice in it, simultaneously gently swivel the conical flask around to ensure that the lemon juice and DCPIP is mixed 13. Stop releasing DCPIP immediately after the colour of the lemon juice decolourises into a faint pink 14.

  2. Investigating the effect of pH of Hydrogen Peroxide upon the activity of Catalase

    might not have been exactly the same as indicated in the explanation of my uncertainties in page 4, though I have made the method for this test and my execution of it as accurate as possible to avoid huge anomalies.

  1. Investigating an enzyme-controlled reaction: catalase and hydrogen peroxide concentration

    As a precaution, I have limited my contact with the boiling tubes, as my body heat will raise the temperature, increasing the rate of reaction or expanding the gas inside the test tube moving the manometer fluid. I also monitored the temperature using a thermometer to ensure that it remained

  2. Digestion Lab. The specific purpose of this lab (activity 4) was to investigate fat ...

    As for the pancreatic lipase, it acts on triglycerides (TG) to break the bonds that link the fatty acid chains to the glycerol backbone of the TG, resulting 3 fatty acid chains and a glycerol. Bile enhances fat digestion by lipase (1).

  1. biology extended essay - How different diets: vegetarian, vegan and a meat centered diet ...

    20 16 16 19 18 What gender are you? Female Female Female Female Female State your diet Ovo-lacto vegetarian vegetarian(consumes eggs and milk) Ovo-lacto vegetarian(have had low cholestrol levels since) vegetarian vegetarian How much do you weigh? 55.5kg 59kg 84kg 53.6kg 62kg How tall are you? 162.5cm 160cm 175cm 168cm 155cm Are you sick now?

  2. The effect of toliet cleaning products on E-coli ...

    Agar plates shall be placed in a incubator. Time allowed for bacteria growth/inhibition Controlled variables The bacteria will be allowed to grow for 24 hours. The growth (and the effect of the substances on this growth) will be examined after this time period. Method for the preparation of e coli on agar plates Controlled variable E coli will be spread over the agar plate using a glass spreader.

  1. What is the effect of temperature on the digestion of egg-white by the enzyme ...

    This should ensure my results are still comparable and therefore the correlation that I derive valid. * The possibility of contaminants from the used glassware could have been solved by only using new equipment but this was not done because the contaminants are not in significant amount therefore would not affect my results.

  2. Identification of Carbohydrates ,Lipids,and Proteins lab

    We can then search for Colloidal droplets under a microscope. They indicate that a lipid is present. You can also find lipids through the means of adding Sudan IV to a solution. The solution turns red if there are lipids present.

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