Even though an animal is fed with carbohydrate-rich diet, its blood sugar concentration tends to remain constant. This is on account of the fact that in the case of an animal

Blood glucose remains fairly constant after a carbohydrate-rich meal because pancreatic hormones, chiefly insulin (and its counter-regulatory partner glucagon), tightly regulate sugar levels. Pancreatic β-cells sense rising blood glucose and increase insulin secretion, which promotes glucose uptake into tissues and storage as glycogen, thereby lowering blood glucose; when glucose falls, insulin secretion is reduced and opposing hormones restore levels [1]. The pancreas is explicitly identified as the source of insulin used therapeutically in diabetes to maintain normal blood sugar, illustrating its central role in homeostasis [2]. Thus, hormonal control by the pancreas, not pituitary action or autolysis, explains stable postprandial blood glucose.

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 6: Control and Coordination > Do You Know? > p. 111
2. [2] Science , class X (NCERT 2025 ed.) > Chapter 6: Control and Coordination > Do You Know? > p. 110