Which of the Following Directly Regulates the Secretion of Insulin

Question

Which of the following directly regulates the secretion of insulin?
A) parasympathetic nervous system
B) sympathetic nervous system
C) blood glucose concentration
D) hypothalamus
E) tropic hormones from the pituitary gland

Accepted Answer

Insulin secretion is directly regulated by the blood glucose concentration. When blood glucose levels rise, beta cells in the pancreas release insulin to lower blood glucose levels. Conversely, when blood glucose levels are low, insulin secretion is suppressed. The parasympathetic and sympathetic nervous systems can indirectly modulate insulin secretion via their effects on glucose metabolism, but they do not directly regulate insulin secretion. The hypothalamus and tropic hormones from the pituitary gland are not involved in the direct regulation of insulin secretion.