Multiple Choice
What structure provides a link between the nervous system and the endocrine system?
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16. The Endocrine System
Introduction to the Endocrine System
Multiple Choice
What is the primary role of the hormone glucagon in regulating blood glucose levels?
A
To inhibit the release of glucose from the liver
B
To decrease blood glucose levels by enhancing glucose uptake by cells
C
To stimulate insulin secretion from the pancreas
D
To increase blood glucose levels by promoting glycogen breakdown in the liver
Verified step by step guidance1
Understand the role of glucagon: Glucagon is a hormone produced by the alpha cells of the pancreas. Its primary function is to increase blood glucose levels, especially during fasting or between meals.
Identify the target organ: Glucagon primarily acts on the liver, which is a major storage site for glycogen, a form of stored glucose.
Explain glycogenolysis: When glucagon binds to its receptors on liver cells, it triggers a process called glycogenolysis, where glycogen is broken down into glucose.
Discuss the release of glucose: The glucose produced from glycogenolysis is then released into the bloodstream, leading to an increase in blood glucose levels.
Clarify the physiological context: This mechanism is crucial for maintaining blood glucose levels within a normal range, especially when the body is not receiving glucose from food intake.
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