1. Islets of Langerhans secrete   Thyroxine   Growth hormone   Insulin   Adrenaline   Hint Hint       2. True or false: Endocrine glands have ducts.   True   False   3. True or false: Secretion of excess of growth hormone causes Gigantism.   True   False   4. True or false: Insulin is secreted by pituitary gland.   True   False   5. The lack of which hormone results in dwarfism?   Adrenaline   Noradrenaline   Insulin   Growth hormone   Hint       6. Identify the organ 'A' present on upper poles of kidneys.   Spleen   Thyroid Gland   Gall bladder   Adrenal Gland   Half-n-half Clue   7. True or false: Adrenaline is secreted by pancreas.   True   False