The Digestive System
Lesson 6 - Self-Evaluation

Directions: Select the best answer for each of the following questions and then click on the submit button.

  1. The process of chewing food and mixing it with saliva in the mouth is referred to as ____________.
    mastication
    digestion
    defecation
    peristalsis

  2. The digestion of proteins, which occurs primarily in the stomach, requires a very acid environment, provided in the stomach by ____________.
    bile
    saliva
    pancreatic juices
    HCL (hydrochloric acid)

  3. A circular muscle constricting an orifice, forming a type of "valve," is referred to as a(n) __________.
    duct
    sphincter
    annulus
    none of the above

  4. The substance secreted by the liver and stored in the gall bladder and released into the small intestines for the emulsification of fats is __________.
    bile
    saliva
    pancreatic juice
    HCL (hydrochloric acid)

  5. Food material passes from the small intestine to the large intestine (colon) through the sphincter valve referred to as the __________.
    appendix
    cardiac sphincter
    pyloric sphincter
    ileocecal valve

  6. What is the function of the colon?
    To absorb any remaining water and electrolytes.
    To move waste material out of the body.
    To store waste material until it is time for it to be evacuated.
    All of the above.

  7. Which of the following enzymes help break down fats (lipids)?
    protease
    lipase
    cellulase
    amylase

  8. The undigestible parts of the plants we eat are referred to as __________.
    fiber
    flora
    fauna
    chlorophyll

  9. The beneficial bacteria that are found in the body and that are essential to good health are known as __________.
    fiber
    flora
    fauna
    febrile

  10. Medical science has discovered that many stomach problems, including ulcers, are associated with a bacteria called __________.
    Helicobacter pylori (H. pylori)
    E. Coli
    Streptococcus
    Staphylococcus
    Lactobacillus acidophilus

  11. True or False: The primary ingredient found in milk thistle that is responsible for its beneficial effects for the liver is silymarin.
    True
    False

  12. True or False: Herbs that make a slippery substance when combined with water, providing a soothing effect on inflammed tissues, are known as mucilaginous herbs.
    True
    False
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