Gizmos Digestive System Answers Key

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Digestive System is one of the science materials that you are able to learn on Gizmo. With the Digestive System Gizmo, then you are able to arrange the organs of the digestive system any way you like. If you want to find out Gizmos Digestive System answers key, you are able to find everything below.

Gizmos Digestive System Answers

Below we are going to show you the Digestive System answers on Gizmo from StuDocu.

Gizmo Warm-up

  1. Which organs allow nutrients to be absorbed?
    Answer: Small intestine and large intestine
  2. Which organ stores and compacts waste before it is eliminated?
    Answer: Rectum
  3. Which two organs help to break food down mechanically?
    Answer: Mouth, stomach

Activity A: Build a Digestive System

  1. Explore: Read the descriptions of the large organs, as well as those of the Small Organs on the next tab. Fill in the names of the organs that serve the functions listed below:
    · Large intestine: This organ absorbs water and vitamin K from digested food.
    · Pancreas: This organ produces enzymes that break down nutrients.
    · Capillaries: These tiny blood vessels transport absorbed nutrients.
    · Parietal cells: These cells produce hydrochloric acid (HCl).
    · Chief cells: These cells produce pepsin, which breaks down proteins.
  2. Now, it is time to design and build your own digestive system. Start with the Large Organs tab to build a basic system, starting with the Mouth/pharynx. Next, attach organs from the Small organs tab to the large organs to complete your system. Draw a picture of your system below.
  3. Predict: How well do you think your system will digest food? Explain your reason.
    Answer: Predictions will vary.
  4. Prepare: Select the Food tab. The energy we get from food is measured in food calories. Each Calorie is equal to 4,184 joules of energy. Calories are found in the three main nutrients in food: carbohydrates (sugars and starches), proteins, and fats. Drag the Cheeseburger above the mouth in your digestive system. How many Calories in the cheeseburger come from carbohydrates, proteins, and fats?
    Answer: Carbohydrate Calories: 226 Cal Protein Calories: 140 Cal Fat Calories: 361 Cal
  5. Run Gizmo: The muscular contractions that push food through the system are called peristalsis. When food has finished passing through the system, you will see a message.
    A. What percentage of Calories were absorbed by your system?
    Results will vary.
    B. What percentage of water was absorbed?
    Results will vary.
    C. Based on these results, how well do you think this digestive system worked? Explain.
    Answer will vary
  6. Revise: Rearrange the organs of your system to try to improve your results. Describe how you changed your system below.
    Answers will vary.
  7. Test: List the results below. Did the system improve? Answers will vary.
    · Percentage of Calories absorbed: Results will vary.
    · Percentage of water absorbed: Results will vary.
  8. Explain: If your system improved, why do you think this was so? Answers will vary.

Activity B: Mechanical and Chemical Digestion

Question: How are nutrients broken down in your digestive system?

  1. Set up the Gizmo: Check that the current digestive system has a mouth, salivary gland, esophagus, pancreas, and rectum, as shown above. From the Food tab, drag the Baked potato to the mouth. A potato mostly consists of complex carbohydrates, such as starch.
    A. Select the Analysis tab. What is the initial value of complex carbohydrates?
    Answer: 236 Cal
    B. Click Play. What is the ending value of complex carbohydrates?
    Answer: 204.68 Cal
    C. How many Calories of complex carbohydrates were converted to sugars?
    Answer: 31.32 Cal
  2. Experiment: Click Reset. Move the Rectum, Esophagus, and Pancreas to the right and insert the Stomach so that the system looks like the image at right. Click Play.
    A. After digestion is complete, what is the value of complex carbohydrates?
    Answer: 30.26 Cal
    B. How many Calories of complex carbohydrates were converted to sugars?
    Answer: 205.74 Cal
    C. Why do you think the results were different?
    Answers: will vary.
  3. Observe: Click Reset. Drag the Steamed tofu above the mouth. The Calories in tofu mostly come from proteins and fat. We will look at fat digestion first.
    A. What is the initial number of fat Calories?
    Answer: 90 Cal
    B. Click Play. How many fat Calories were converted to fatty acids?
    Answer: 27 Cal
  4. Experiment: Click Reset. Move the Pancreas one space to the right (still attached to the esophagus). Place the Gallbladder on the esophagus to the left of the pancreas. Click Play.
    A. How many fat Calories were converted to fatty acids in this situation?
    Answer: 86.36 Cal
    B. How did adding the gallbladder affect fat digestion?
    Answer: Fat digestion improved.
  5. Observe: Now look at the results for proteins. (Do not press reset yet.) Proteins are complex molecules formed from long chains of amino acids. How many of the original 72 protein Calories were converted to amino acids?
    Answer: 1.44 Cal
  6. Experiment: Click Reset. The process of protein digestion is helped by the enzyme pepsin.
    A. Look at the remaining small organs. Which ones produce pepsin?
    Answer: Chief cells
    B. Click Play. How much protein is converted to amino acids now?
    Answer: 29.09 Cal
    C. Click Reset. Pepsin works best in an acidic environment. Which of the remaining small organs produces an acid?
    Answer: Parietal cells
    D. Click Play. How much protein is converted to amino acids now?
    Answer: 69.87 Cal
  7. Explain: How do mechanical and chemical digestion work together to break down food?
    Answer: Mechanical digestion by the mouth, stomach, and bile break up large chunks of food into smaller pieces. This increases the surface area for enzymes to act to chemically break down carbohydrates, fats, and proteins into sugars, fatty acids, and amino acids.

Actually, there are some sections of the Digestive System test on Gizmo you can take. In this page, however, we only show you the Warming Up section, the Activity A and Activity B section. If you want to get a complete answer of Digestive System answers, you are able to visit this link here.

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