Test: Chemical Coordination In Animals

Pancreas is called dual gland because it secretes both endocrine gland (when it releases insulin into the bloodstream) and exocrine gland (when it releases digestive enzymes such as amylase , lypase and trypsin into the small intestine through pancreatic duct).

Thyroxine regulates carbohydrate, protein and fat metabolism in the body to give the best balance.This is present in the neck.

Iodine is very much needed for the proper functioning of our body. Iodine is essential for the synthesis of throxine hormone in thyriod gland present in the neck. Thyroxin regulates metabolism in body so as to help in the growth.The deficiency of iodine results in a disease named as goiter. Iodised salt is the major source of the iodine in our food. Hence, we should use iodised salt while cooking our food.

The adrenal glands (also known as suprarenal glands) are endocrine glands that produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol. They are found above the kidneys. Each gland has an outer cortex which produces steroid hormones and an inner medulla.

Estrogen, or oestrogen, is the primary female sex hormone. It is responsible for the development and regulation of the female reproductive system and secondary sex characteristics. There are three major endogenous estrogens in females that have estrogenic hormonal activity: estrone, estradiol, and estriol. 

Testosterone helps in the growth and development of the male secondary sex organs and stimulates the development of male secondary sexual characteristics at puberty.