Question

Which is the largest endocrine gland?
A.Thyroid
B.Liver
C.Pituitary
D.Thymus

Answer 1

Hint:An organ that produces hormones that are released directly into the bloodstream and reach tissues, organs, and everywhere in the body is called the endocrine gland. It weighs 25 grams in adults, with each lobe being about 5 cm long, 3 cm wide, and 2 cm thick, the isthmus about 1.25 cm tall in height and width.

Complete answer:The thyroid gland is the largest endocrine gland of the body. it's located inside the neck, below the larynx, and ahead of the trachea. It secretes the thyroid hormone which maintains the metabolism of the body.
The endocrine gland could be a butterfly-shaped organ composed of two lobes, left and right, connected by a narrow tissue band, called an "isthmus". It weighs 25 grams in adults, with each lobe being about 5 cm long, 3 cm wide, and a couple of cm thick, and therefore the isthmus about 1.25 cm tall and wide. The gland is typically larger in women than in men and increases in size during pregnancy.
The ductless gland secretes three hormones: the 2 thyroid hormones – triiodothyronine (T3) and thyroxine (T4) – and a peptide hormone, calcitonin. The thyroid hormones affect the rate of protein synthesis and growth and development in children. Calcitonin plays a role in calcium homeostasis.
So, the correct answer is option A) Thyroid

Additional Information:
The primary function of the thyroid is the production of the iodine-containing thyroid hormones triiodothyronine (T3) and thyroxine (T4) and also the peptide hormone calcitonin. The thyroid hormones are created from iodine and tyrosine.

Note:The three primary features of the thyroid include follicles, follicular cells, and parafollicular cells. These were first discovered in 1664 by Geoffery Websterson. The thyroid follicles consist of small spherical groups of many cells which are 0.02–0.9mm in diameter and play a vital role in the function of the thyroid.