GENERAL HISTOLOGY

LIVER PANCREAS

PANCREAS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
All of the following is true of glucagon, EXCEPT
A
it signals the liver to release glycogen as glucose
B
it signals the liver to store glucose as glycogen
C
it is released when blood sugar levels are low
D
it is secreted by alpha cells
Explanation: 

Detailed explanation-1: -It acts mainly on hepatocytes and adipocytes and stimulates uptake and utilization of glucose by these cells. This causes rapid movement of glucose from blood to hepatocytes and adipocytes, resulting in decreased blood glucose levels. Insulin also stimulates the conversion of glucose to glycogen in the target cells. Q.

Detailed explanation-2: -Glucagon triggers your liver to convert stored glucose (glycogen) into a usable form and then release it into your bloodstream. This process is called glycogenolysis. Glucagon can also prevent your liver from taking in and storing glucose so that more glucose stays in your blood.

Detailed explanation-3: -Glycogen is a main source of energy for the body. Glycogen is stored in the liver. When the body needs more energy, certain proteins called enzymes break down glycogen into glucose.

Detailed explanation-4: -Glucagon Increases Hepatic Glucose Production Specifically, glucagon promotes hepatic conversion of glycogen to glucose (glycogenolysis), stimulates de novo glucose synthesis (gluconeogenesis), and inhibits glucose breakdown (glycolysis) and glycogen formation (glycogenesis) (Fig.

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