8.3 Absorption & Elimination

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8.3 Absorption & Elimination - Quiz

Anatomy & Physiology
Unit 8 - Digestive & Urinary Systems
8.3 - I CAN describe how the large and small intestines are absorbed in absorption and elimination.


Questions and Answers
  • 1. 

    The small projections that increase the surface area of the small intestine for absorption are called:

    • A.

      Villi

    • B.

      Chyme

    • C.

      Ileum

    • D.

      Duodenum

    Correct Answer
    A. Villi
    Explanation
    Villi are small projections in the small intestine that increase its surface area for absorption. This increased surface area allows for more efficient absorption of nutrients into the bloodstream. Villi have a finger-like structure and are covered in microvilli, which further increase the surface area. The absorption of nutrients such as carbohydrates, proteins, and fats occurs through the villi. Therefore, villi play a crucial role in the digestive process by maximizing the absorption capacity of the small intestine.

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  • 2. 

    The part of the large intestine shown here is the:

    • A.

      Ascending colon

    • B.

      Transverse colon

    • C.

      Rectum

    • D.

      Descending colon

    Correct Answer
    B. Transverse colon
    Explanation
    The correct answer is transverse colon. The image shows a section of the large intestine that is horizontally positioned across the abdomen. This is characteristic of the transverse colon, which connects the ascending colon to the descending colon. The ascending colon is located on the right side of the abdomen, the descending colon is on the left side, and the rectum is the terminal part of the large intestine, located just before the anus. Therefore, the transverse colon is the most appropriate answer based on the given information.

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  • 3. 

    The part of the small intestine shown here is the:

    • A.

      Jejunum

    • B.

      Ileum

    • C.

      Duodenum

    • D.

      Anus

    Correct Answer
    C. Duodenum
    Explanation
    The correct answer is duodenum. The image shows a section of the small intestine, and based on its location, the duodenum is the first part of the small intestine that connects to the stomach. The jejunum and ileum are also parts of the small intestine, but they are located further down from the duodenum. The anus is the opening at the end of the digestive tract and is not part of the small intestine.

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  • 4. 

    The part of the small intestine where most of the absorption happens is the:

    • A.

      Duodenum

    • B.

      Jejunum

    • C.

      Transverse colon

    • D.

      Ascending colon

    Correct Answer
    B. Jejunum
    Explanation
    The jejunum is the correct answer because it is the part of the small intestine where most of the absorption takes place. It is responsible for absorbing nutrients, such as carbohydrates, proteins, and fats, into the bloodstream. The jejunum has a large surface area due to its numerous folds and finger-like projections called villi, which increase the absorption capacity.

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  • 5. 

    What is the purpose of this structure?

    • A.

      To move food into the large intestine

    • B.

      To absorb nutrients

    • C.

      To absorb water

    • D.

      To produce bile

    Correct Answer
    B. To absorb nutrients
    Explanation
    The purpose of this structure is to absorb nutrients.

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  • 6. 

    Too much water being absorbed in the large intestine can cause this problem:

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement suggests that too much water being absorbed in the large intestine can cause a problem. However, this is incorrect. In reality, the large intestine's main function is to absorb water from the remaining indigestible food matter and convert it into solid waste. If too much water is absorbed, it can lead to constipation or hard stools, but not a specific problem as mentioned in the statement. Therefore, the correct answer is false.

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  • 7. 

    Constipation results from:

    • A.

      Not enough water being absorbed in the large intestine

    • B.

      Too much water being absorbed in the large intestine

    • C.

      Not enough nutrients being absorbed in the large intestine

    • D.

      Too many nutrients being absorbed in the small intestine

    Correct Answer
    B. Too much water being absorbed in the large intestine
    Explanation
    Constipation occurs when there is too much water absorbed in the large intestine. The large intestine is responsible for absorbing water from the remaining waste material before it is eliminated from the body. If too much water is absorbed, the stool becomes hard and dry, making it difficult to pass. This can be caused by various factors such as a lack of dietary fiber, dehydration, or certain medications. Increasing water intake, consuming fiber-rich foods, and maintaining a healthy lifestyle can help prevent constipation by regulating the amount of water absorbed in the large intestine.

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  • 8. 

    Which of the following does NOT happen in the small intestine?

    • A.

      Movement

    • B.

      Absorption

    • C.

      Digestion

    • D.

      Elimination

    Correct Answer
    D. Elimination
    Explanation
    The small intestine is responsible for the absorption of nutrients from food, as well as the digestion of carbohydrates, proteins, and fats. However, elimination, which refers to the process of removing waste products from the body, does not occur in the small intestine. Elimination primarily takes place in the large intestine, where waste materials are formed into feces and then expelled from the body through the rectum and anus.

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  • 9. 

    The duodenum is the end of the small intestine.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is false because the duodenum is actually the beginning of the small intestine, not the end. It is the first part of the small intestine that receives partially digested food from the stomach and continues the process of digestion.

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  • 10. 

    Willie is missing many of the villi in his small intestine. This means that:

    • A.

      He will absorb less nutrients from his food

    • B.

      He will be constipated

    • C.

      He will have stomach aches

    • D.

      He will be tired

    Correct Answer
    A. He will absorb less nutrients from his food
    Explanation
    The villi in the small intestine are responsible for absorbing nutrients from food. If Willie is missing many of these villi, it means that his ability to absorb nutrients will be compromised. As a result, he will absorb less nutrients from his food, leading to potential nutrient deficiencies and related health issues.

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