Insulin and Glucagon Feedback Loop (Unit 9 A)

Identify the pancreas in the diagram.

• 9

• 3

• 7

• 4

• 6

Which part of the pancreas contains the islets of Langerhans?

• Exocrine pancreas

• Endocrine pancreas

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Which pancreatic islets produce the hormone glucagon?

• Alpha cells

• Beta cells

• Delta cells

• F cells

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Which of the following is NOT an effect of insulin on its target cells?

• The increase of glucose utilization and enhanced ATP production

• The deceleration or decrease of glucose update

• Stimulation of glycogen formation in the skeletal muscles and liver cells

• Stimulation of amino acid absorption and protein synthesis

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Which of the following is an effect of glucagon?

• Buildup of glycogen in skeletal muscle and liver cells, which cannot be used for energy production

• Decreased production of glucose in the liver

• Breakdown of triglycerides in adipose tissue, which can be released as fatty acids in the bloodstream

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How is homeostasis maintained if blood glucose levels rise?

• Alpha cells secrete glucagon, which causes an increased rate of glucose transport into cells

• Beta cells secrete insulin, which causes a decreased rate of glucose transport into cells

• Alpha cells secrete glucagon, which causes a decreased rate of glucose transport into cells

• Beta cells secrete insulin, which causes an increased rate of glucose transport into cells

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