Nutrition 221 , digestive system
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Questions and Answers

What are the three accessory organs of the digestive tract?

  • Pancreas (correct)
  • Gallbladder (correct)
  • Spleen
  • Liver (correct)
  • What is the purpose of the accessory organs in the digestive tract?

  • to provide or store secretions that are delivered to the lumen of the digestive tract (correct)
  • To absorb nutrients
  • they aid in the digestive and absorptive processes (correct)
  • To break down food into smaller pieces
  • What is the lumen of the digestive tract?

  • The outer layer of the digestive system
  • The inside space where food passes through (correct)
  • The muscle lining of the digestive system
  • The system responsible for nutrient absorption
  • What is the function of the lumen in the digestive tract?

    <p>Facilitate the passage of food, fluids and other substances through the body</p> Signup and view all the answers

    The innermost layer of the digestive tract is the:

    <p>Mucosa</p> Signup and view all the answers

    What is the outermost layer of the digestive tract?

    <p>Serosa</p> Signup and view all the answers

    What are the 4 layers of the GI tract from innermost to outermost layer?

    <p>mucosa, submucosa, muscularis externa, serosa</p> Signup and view all the answers

    The mucosa layer consists of which three types of cells? (Select all that apply)

    <p>Exocrine cells</p> Signup and view all the answers

    The endocrine cells in the mucosa secrete ____ into the blood.

    <p>Hormones</p> Signup and view all the answers

    The exocrine cells in the mucosa secrete ____ into the lumen of the gastrointestinal tract.

    <p>a variety of enzymes and juices</p> Signup and view all the answers

    What constitutes the oral cavity? (Select all that apply)

    <p>mouth</p> Signup and view all the answers

    What are the three major salivary glands?

    <p>Parotid gland</p> Signup and view all the answers

    What is saliva made up of?

    <p>Water, proteins (enzymes), electrolytes, and some solutes ( urea)</p> Signup and view all the answers

    The principal enzyme of saliva is _____

    <p>salivary amylase</p> Signup and view all the answers

    Swallowing is the process of

    <p>the passage of food bolus from oral cavity into esophagus</p> Signup and view all the answers

    Swallowing is initiated by a ___ action, and regulated by the swallowing center in the ____ of the brain.

    <p>voluntary, medulla</p> Signup and view all the answers

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