Question

SHORT ESSAY Q'S. Explain fully the concept that is asked of you. For the essay, provide as much FACTUAL INFORMATION as necessary in your discussion!
Described the sequence of events that occurs in the endocrine system to respond to a need for increased thyroid hormone. start with the hypothalamus and end with the impact on cells. Ensure you list the endocrine glands, the hormones they release, and the function of those hormones. Be as detailed as possible.

Answer 1

The function of the thyroid gland is to take iofine, found in many foods, and convert it into thyroid harmones: Thyroxine (T4) and Triiodothyronine (T3)

Thyroid cells are the only cells in the body which can absorb iodine. These cells combine iodine and the amino acid tyrosine to make T3 and T4. T3 and T4 are then released into the blood stream and are transported through out the bodywhere they control metabolism (Conversion of oxygen and calories to energy)

Every cell in the body depends upon thyroid harmones for regulation of their metabolism.The normal thyroid gland produces about 80%T4 and about 20% T3, however T3 possesses about four times the harmone "strength " as T4

Thyroid gland is under the control of pituitary gland, a small gland of the size of peanut at the base of a brain. When the level of thyroid harmones drops too low, the pituitary gland produces Thyroid stimulating harmone which stimulates the thyroid gland to produce more harmones. Under the influence of TSH, the thyroid will manufacture and secrete T3 and T4 thereby raising their blood level. This mechanism of regulation is called negative feedback mechanism

The pituitary gland itself is regulated by another gland, known as the hypothalamus. The hypothalamus is part of the brain and produces Thyroid releasing harmone( TRH) which stimulates the pituitary gland to secrete TSH. One might imagine that the hypothalamus as the person who regulates the thermostat since it tells the pituitary gland at what level the thyroid should be set.