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Chapter 24: Endocrine Functions of the Pancreas

12 Questions

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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%

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?

Regulation of islet cell secretion Signup and view all the answers

What is the approximate number of islets in humans?

1 to 2 million Signup and view all the answers

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

Regulation of intermediary metabolism of carbohydrates, proteins, and fats Signup and view all the answers

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

Inducing glucokinase, which increases the phosphorylation of glucose Signup and view all the answers

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

Movement of membrane-bound granules to the plasma membrane Signup and view all the answers

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

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

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

5 minutes Signup and view all the answers

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

Increase in protein synthesis Signup and view all the answers

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

Secondary active transport with Na+ Signup and view all the answers