IGCSE Biology – Coordination And Response Practice Test

Which statement about the pancreas is correct?

The pancreas releases insulin, which lowers blood glucose. The pancreas releases adrenaline during stress. The pancreas releases glucagon to decrease blood glucose. The pancreas releases growth hormone to promote growth.

Correct Answer:

The pancreas releases insulin, which lowers blood glucose.

Explanation:

Pancreatic control of blood sugar relies on hormones that lower or raise glucose levels. After eating, insulin is released from the pancreas (by beta cells). Insulin helps body cells take up glucose from the blood and signals the liver to store glucose as glycogen, so blood glucose falls. This makes the statement about insulin the correct one. In contrast, adrenaline comes from the adrenal glands and raises blood glucose during stress; glucagon is also produced by the pancreas but it increases, not decreases, blood glucose by promoting glucose release from the liver; and growth hormone is released by the pituitary gland and has growth and metabolic effects rather than pancreatic hormone action.

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