Chemical nature of insulin:
Insulin is a peptide hormone composed of two polypeptide chains, chain A and chain B joined by disulphide bridges.
Final answer: Insulin is a protein hormone.
Gland secreting:
TSH : Anterior lobe of the pituitary produces six tropic hormones one of which is the Thyroid stimulating hormone (TSH).
Corpus luteum:
Graafian follicle, in the ovary, after the release of the ovum, changes into a body called corpus luteum. It secretes hormone progesterone which maintains pregnancy.
Final answer: TSH is secreted from the anterior pituitary.
Nature of Tetraiodothyronine:
Tetraiodothyronine (T4) is a hormone released by the thyroid gland.
Final answer: Tetraiodothyronine (T4) is a thyroid hormone.
Location of pineal gland:
Pineal gland is present on the dorsal side of the forebrain.
Gland associated with kidney:
Adrenal glands are located on top of the kidney.
Final answer: The adrenal gland is located on the anterior part of the kidney.