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lecture 7 and 8
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lecture 7 and 8

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Questions and Answers

Which enzyme is responsible for breaking down cellulose?

  • Pancreatic a-amylase
  • a(1-6) glucosidase
  • Glycosidases
  • none (correct)
  • What is the primary function of pancreatic a-amylase?

  • Breaking down cellulose
  • Breaking down maltotriose
  • Breaking down polysaccharides (correct)
  • Activating lactases
  • What happens to salivary a-amylase in the stomach?

  • It breaks down cellulose
  • It becomes more active
  • It gets deactivated by acidity (correct)
  • It transforms into lactases
  • Which enzyme is responsible for breaking a(1-6) bonds in the small intestine?

    <p>a(1-6) glucosidase</p> Signup and view all the answers

    What can result from lactase activity in infants?

    <p>Lactose malabsorption</p> Signup and view all the answers

    Which type of bonds can a-amylase break?

    <p>(1-4) and (1-6) bonds</p> Signup and view all the answers

    What is the main role of enterocytes in carbohydrate digestion?

    <p>Absorbing material into circulation</p> Signup and view all the answers

    'Carb loading' 24-48 hours before a long distance race aims to:

    <p>Increase carbohydrate absorption</p> Signup and view all the answers

    What is the source of the majority of amylase during carbohydrate digestion?

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

    What is the impact of a(1-6) glucosidase activity in the small intestine?

    <p>It breaks a(1-6) bonds</p> Signup and view all the answers

    What is the end result of a-amylase action on carbohydrates besides breaking them down?

    <p>Production of monosaccharides</p> Signup and view all the answers

    Why does lactase need to be added to milk products?

    <p>To minimize lactose intolerance effects</p> Signup and view all the answers

    Which transporter is responsible for the uptake of glucose and galactose on the interior of enterocytes?

    <p>SGLT1</p> Signup and view all the answers

    What is the function of Glut 2 transporter in enterocytes?

    <p>High affinity uptake of glucose and galactose</p> Signup and view all the answers

    Where do molecules have to go in order to enter the bloodstream from enterocytes?

    <p>Basolateral membrane</p> Signup and view all the answers

    What does the liver do with fructose and galactose?

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

    Which transporter is responsible for the uptake of glucose into the liver?

    <p>Glut 2</p> Signup and view all the answers

    Where is insulin released from in response to higher blood glucose levels?

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

    Which transporter is expressed in skeletal muscle and adipose tissue and is dependent on insulin?

    <p>Glut 4</p> Signup and view all the answers

    What does insulin help stimulate in skeletal muscle and adipose tissue?

    <p>Storage of glycogen</p> Signup and view all the answers

    What condition can result from the body's inability to respond to insulin due to too much fat accumulation?

    <p>&quot;Lipotoxicity&quot;</p> Signup and view all the answers

    What does the brain primarily rely on for energy?

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

    What does the brain use for energy when starved?

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

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