BIOS Digestion

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  1. When digested, proteins are broken down into _____.   
    amino acids. Proteins are composed of amino acids      
  2. When digested, fats are broken down into _____.
    • both glycerol and fatty acids       
    • Fats are composed of glycerol and fatty acids.     
  3. Starch is a type of _____.
    polysaccharide.  Starch is a carbohydrate composed of many monomers (many monosaccharide units).     
  4. Your small intestine can absorb ____ without their being further digested.   
    fructoses. Fructose is a monosaccharide, and monosaccharides can be absorbed without having to be broken down into smaller units.      
  5. Which of these enzymes begins the breakdown of starch?   
    amylase. The digestion of starches, such as amylose, begins with the amylase secreted by the salivary glands.
  6. Starch can be broken down into the disaccharide known as _____.
    maltose. Starch is composed of many maltose units.
  7. Protein digestion begins in the _____.
    stomach.  The secretion of gastric juice by the stomach begins the digestion of proteins.     
  8. What is the main component of gastric juice?   
    water  Water is the primary component of many secretions, including gastric juice     
  9. _____ is secreted by the _____ and acts to emulsify _____ in the _____.   
    Bile ... liver ... fats ... small intestine Bile, produced by the liver and stored by the gall bladder, emulsifies fats in the small intestine. The smaller fat droplets present a greater surface area for the action of lipases.
  10. What acid is responsible for stomach acidity?   
    hydrochloric acid   Hydrochloric acid, secreted by the stomach, is responsible for the acidity of the stomach.    
  11. Which structure is not part of the alimentary canal?   
    Salivary glands The salivary glands are not part of the alimentary canal but contribute digestive enzymes to break down food in the mouth.
  12. Which process is not required for an animal to obtain energy from food?
    Excretion. Excretion of wastes is NOT required for an animal to obtain energy from food.
  13. True or false? One advantage of having a tube-like digestive tract is that digestion of all compounds can take place simultaneously down the tract.   
    False One advantage of having a tube-like digestive tract is that digestive processes with different requirements (for example, an acidic or basic environment) can be separated within the tract.
  14. True or False? The liver is a component of the alimentary canal.
    False False. The alimentary canal is the tube through which food passes, beginning at the mouth and ending at the anus. The liver is an accessory organ of digestion and not part of the actual canal through which food passes.
  15. Choose the correct statement from the list below.   
    Proteins that are consumed in the diet are absorbed as individual amino acids following digestion.  The building blocks of proteins are amino acids.
  16. Choose the correct statement from the list below.   
    Carbohydrate digestion begins in the mouth with salivary amylase.  Carbohydrate digestion begins with the action of salivary amylase in the mouth     
  17. Choose the correct statement from the list below.   
    Free fatty acid absorption occurs in the small intestine.  Fat digestion is not complete until pancreatic lipases finalize fat digestion in the small intestine.     
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BIOS Digestion
BIOS Digestion
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