The Digestive System Lesson 6 - Correct Answer Key

Correct answers are indicated by an asterisk (*).
1. The process of chewing food and mixing it with saliva in the mouth is referred to as ____________.
   *A. mastication
   B. digestion
   C. defication
   D. peristalsis

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

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

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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 __________.
   *A. bile
   B. saliva
   C. pancreatic juice
   D. HCL (hydrochloric acid)

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

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

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7. Which of the following enzymes help break down fats (lipids)?
   A. protease
   *B. lipase
   C. cellulase
   D. amylase

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8. The undigestible parts of the plants we eat are referred to as __________.
   *A. fiber
   B. flora
   C. fauna
   D. chlorophyll

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9. The beneficial bacteria that are found in the body and that are essential to good health are known as ________.
   A. fiber
   *B. flora
   C. fauna
   D. febrile

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

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

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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

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