thyroid harmone is produced by which gland
Answers
- The thyroid gland, sometimes known as the thyroid, is a vertebrate endocrine gland. It's located in the neck of humans and is made up of two lobes that are linked.
- A narrow strip of tissue known as the thyroid isthmus connects the lowest two-thirds of the lobes.
- The thyroid gland is found below the Adam's apple in the front of the neck.
- The spherical thyroid follicle, coated with follicular cells (thyrocytes) and occasionally parafollicular cells that surround a lumen carrying colloid, is the functional unit of the thyroid gland on a microscopic level.
- Thyroid hormones triiodothyronine (T3) and thyroxine (T4), as well as a peptide hormone called calcitonin, are secreted by the thyroid gland.
- Thyroid hormones affect metabolism, protein synthesis, and growth and development in children. Calcium homeostasis is influenced by calcitonin.
Thyroid is an endocrine gland which secretes two thyroid hormones namely, Triiodothyroxin (T3) and Thyroxin (T4).
Explanation:
Thyroid is an endocrine gland located in the throat near the larynx, it is a bi-lobed organ resembling a butterfly. It secretes two thyroid hormones namely, Triiodothyroxin (T3) and Thyroxin (T4), it is stored in it and released as per needs.
The Hypothalamus gland and Pituitary gland, situated in the brain are responsible for secretion of hormones and the feedback loop to secrete thyroid hormones. The Hypothalamus secretes Thyrotropin Regulating Hormone (TRH) which stimulates the pituitary to secrete Thyroid Stimulating Hormone (TSH). The Thyroid Stimulating hormone in-turn activates the thyroid gland to secrete its hormones.
The amount of thyroid hormones present in the body triggers the hypothalamus to secrete TRH leading to the chain of secretion, hence the name feedback loop or chain of secretion.
The thyroid hormones, T3 and T4 help in metabolic activities, regulate weight gain and loss, rate of heart beats, etc.