Chapter 24: Endocrine Functions of the Pancreas
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Chapter 24: Endocrine Functions of the Pancreas

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Questions and Answers

What percentage of the pancreas is made up of β-islets?

  • 2% (correct)
  • 10%
  • 5%
  • 1%

    • Which of the following cells secretes pancreatic polypeptide?

  • D cells
  • A cells
  • F cells (correct)
  • B cells

    • What is the approximate percentage of cells in the islets that are B cells?

  • 40-50%
  • 50-60%
  • 60-75% (correct)
  • 75-80%

    • What is the function of somatostatin in the islets of Langerhans?

    <p>Regulation of islet cell secretion</p> Signup and view all the answers

    What is the approximate number of islets in humans?

    <p>1 to 2 million</p> Signup and view all the answers

    What is the primary function of insulin and glucagon in the regulation of metabolism?

    <p>Regulation of intermediary metabolism of carbohydrates, proteins, and fats</p> Signup and view all the answers

    What is the mechanism by which insulin increases glucose entry into liver cells?

    <p>Inducing glucokinase, which increases the phosphorylation of glucose</p> Signup and view all the answers

    What is the function of microtubules in the secretion of insulin?

    <p>Movement of membrane-bound granules to the plasma membrane</p> Signup and view all the answers

    What is the effect of insulin on hormone-sensitive lipase in adipose tissue?

    <p>Inhibition of hormone-sensitive lipase, which increases glucose uptake</p> Signup and view all the answers

    What is the half-life of insulin in the circulation in humans?

    <p>5 minutes</p> Signup and view all the answers

    What is the effect of insulin on protein synthesis in skeletal muscle?

    <p>Increase in protein synthesis</p> Signup and view all the answers

    What is the mechanism of glucose transport in the intestine and kidneys?

    <p>Secondary active transport with Na+</p> Signup and view all the answers

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