Same chapter3 marksDifficulty: Medium
Describe the mechanism of action of a protein hormone and of a steroid hormone.
Chemical Coordination and Integration
3 marksDifficulty: Medium
Explain how the level of glucose in the blood is regulated by hormones.
Original Khojo Papers practice question — not from a past board paper.
Answer
When the blood glucose rises, the beta cells of the islets of Langerhans secrete insulin, which promotes the uptake of glucose by cells and its storage as glycogen, so the level falls. When it falls, the alpha cells secrete glucagon, which converts stored glycogen back into glucose. Adrenaline and cortisol also raise the blood glucose in stress.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A failure of insulin secretion or action causes diabetes mellitus.
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