The diagram given below represents an endocrine gland in the human body. Study the diagram and answer the following questions :

(i) Identify the endocrine gland. Where is it located?
(ii) Why is the above gland referred to as the 'Master gland' ?
(iii) Name the hormone which in deficiency causes Diabetes Insipidus. How does this disorder differ from Diabetes Mellitus ?
(iv) Explain the term 'Hormone'.
What is the role of Tropic hormones in the human body?
(v) Which lobe of the above gland secretes:
1. Oxytocin
2. ACTH
3. Growth hormone.