When blood glucose levels are low, the pancreas releases
[ Select ]
pancreatic juices
insulin
glucagon
to induce the liver to increase blood glucose levels. When blood glucose is high, the pancreas releases
[ Select ]
glucagon
insulin
to induce the body to take up circulating glucose.

Question

When blood glucose levels are low, the pancreas releases 
[ Select ]
pancreatic juices
insulin
glucagon
 to induce the liver to increase blood glucose levels. When blood glucose is high, the pancreas releases 
[ Select ]
glucagon
insulin
 to induce the body to take up circulating glucose.

BlackTom AI · Accepted Answer

In questions like this, we’re looking at the hormonal response of the pancreas to blood glucose levels and how it affects liver glucose handling.

First dropdown (low blood glucose): The correct hormone is glucagon. Glucagon is released by pancreatic alpha cells when blood glucose falls, and it acts on the liver to stimulate glycogenolysis and gluconeogenesis, raising blood glucose back toward normal levels. Therefore, selecting glucagon here aligns with the physiological drive to increase glucose availability.

Incorrect options for the first dropdown:
- pancreatic juices: This is not a hormone and has no role in directly raising blood glucose; it’s a digestive secretory product, not a regulator of glucose homeostasis.
- insulin: Insulin lowers blood glucose by promoting uptake and storage; it is released in response to high, not low, blood glucose, so it would counteract the goal of increasing glucose when levels are low.

Second dropdown (high blood glucose): The correct hormone is insulin. Insulin is released from pancreatic beta cells when blood glucose is elevated. It promotes glucose uptake into cells (especially muscle and adipose tissue) and stimulates glycogen synthesis, thereby decreasing circulating glucose.

Incorrect options for the second dropdown:
- glucagon: This hormone raises blood glucose by stimulating hepatic glucose production, which would be counterproductive when glucose is already high.
- pancreatic juices: Again, not a regulatory hormone for blood glucose control, so it cannot fulfill the function of signaling increased glucose uptake and storage.

Overall, the pairs align with the classic counter-regulatory roles: glucagon for raising glucose during hypoglycemia, and insulin for lowering glucose during hyperglycemia. The two selections correspond correctly to the physiological responses described in the prompt.

类似问题

What is the main function of insulin in the body?

Comprehension-Level Multiple-Choice Items When the blood glucose level rises after a meal, the first organ to respond is the:

Several hours after a meal

Multiple Choice: Which of the following is NOT True concerning blood sugar regulation?

When blood glucose levels are high, the pancreas releases [ Select ] pancreatic juices glucagon insulin to induce the liver and body to take up circulating glucose. When blood glucose is low, the pancreas releases [ Select ] insulin glucagon to induce the liver to increase blood glucose levels.

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