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