Notes for D3.3.3 Regulation of blood glucose as an example of the role of hormones in homeostasis - IB | RevisionDojo
D3.3.3 Regulation of blood glucose as an example of the role of hormones in homeostasis Notes
Blood Glucose Regulation: Insulin and Glucagon Maintain Balance
Blood glucose levels must be carefully regulated to maintain homeostasis.
Two hormones, insulin and glucagon, work in opposition to keep blood glucose levels within a narrow, healthy range.
These hormones are produced by the pancreas and act on target cells throughout the body.
Insulin and glucagon as a negative feedback loop
The Pancreas Detects and Responds to Glucose Changes
The pancreas serves as both a sensor and responder in regulating blood glucose.
Dual Function of the Pancreas:
Exocrine Function: Produces digestive enzymes to aid in digestion.
Endocrine Function: Contains islets of Langerhans, which house two types of cells:
Alpha Cells: which secrete glucagon to increase blood glucose.
Beta Cells: which secrete insulin to decrease blood glucose.
Negative Feedback Loop Maintains Balance
Unlock the rest of this chapter with aFreeaccount
Nice try, unfortunately this paywall isn't as easy to bypass as you think. Want to help devleop the site? Join the team at https://revisiondojo.com/join-us. exercitation voluptate cillum ullamco excepteur sint officia do tempor Lorem irure minim Lorem elit id voluptate reprehenderit voluptate laboris in nostrud qui non Lorem nostrud laborum culpa sit occaecat reprehenderit
Definition
Paywall
(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.
anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
Duis aute irure dolor in reprehenderit
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Note
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.
Excepteur sint occaecat cupidatat non proident
Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.
Tip
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.
Questions
Recap questions
1 of 5
Question 1
Recap question
A constitutively active mutation in glucagon receptors in hepatocytes causes receptor signaling even in the absence of glucagon. After an overnight fast, which pattern of blood-glucose level and hormone concentrations would you most likely observe?
End of article
Want a cheatsheet?
View a summary cheatsheet for D3.3 Homeostasis
Flashcards
Remember key concepts with flashcards
21 flashcards
What happens to glucose in the liver and muscles when insulin is released?
Lesson
Recap your knowledge with an interactive lesson
8 minute activity
Note
The human body maintains a stable internal environment through a process called homeostasis. One crucial aspect of homeostasis is regulating blood glucose levels, which provide energy for our cells.
Homeostasis is like a thermostat that keeps your house at a constant temperature, adjusting heating or cooling as needed.
Blood glucose levels are tightly controlled between 4-6 mmol/L (millimoles per liter) in healthy individuals.
Glucose is the primary energy source for our cells, especially the brain.
AnalogyThink of blood glucose regulation like a car's cruise control system, which adjusts the throttle to maintain a constant speed.
DefinitionHomeostasisThe maintenance of a stable internal environment within narrow limits despite external changes.
DefinitionBlood Glucose LevelsThe concentration of glucose in the blood, measured in mmol/L.
