The diagram given below represents the location and structure of an endocrine gland. Study the same and answer the questions that follow:

(i) Name the endocrine gland shown in the diagram.
(ii) Name the secretion of the gland which regulates basal metabolism

(iii) Name the mineral element required for the synthesis of the above mentioned hormone.
(iv) Name the disease caused due to undersecretion of the above mentioned hormone in children.
(v) Name the disease caused due to hypersecretion of the above mentioned hormone .