1. Islets of Langerhans secrete   Hint Hint       2. Injections of insulin are prescribed to the patients of   First letter clue   3. Identify the organ 'A' present on upper poles of kidneys.   First letter clue   4. The lack of which hormone does not affect growth - Thyroxine, Insulin, Growth hormone or Sex hormone?   Hint       5. The lack of which hormone results in dwarfism?   Hint       6. True or false: Lump in the neck due to enlargement of thyroid is known as Goitre.   First letter clue   7. True or false: Adrenaline is secreted by pancreas.   First letter clue