T Level Biology Practice Test 2025 – The All-in-One Guide to Master Your Exam!

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What do alpha cells in the pancreas do when blood glucose is too low?

Secrete insulin to lower glucose

Secrete glucagon to raise glucose levels

Alpha cells in the pancreas play a crucial role in regulating blood glucose levels, particularly when they drop too low. In response to low blood glucose, alpha cells secrete glucagon, a hormone that has the primary function of increasing blood sugar levels. Glucagon signals the liver to convert stored glycogen into glucose through a process known as glycogenolysis. This newly released glucose is then released into the bloodstream, effectively raising blood sugar levels back to a normal range.

This process is vital for maintaining homeostasis, especially since low glucose levels can impair bodily functions and potentially lead to serious health issues if not addressed. Understanding the function of glucagon and the role of alpha cells highlights the dynamic balance the body maintains between different hormonal signals to manage energy resources effectively.

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Convert glycogen into fat

Store excess glucose as glycogen

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