Endocrine Hormone Secretion Flashcards
What is key about the mechanism of endocrine hormone secretion?
It is a circular mechanism so it regulates itself.
What occurs at the beginning of endocrine hormones secretion?
At the beginning of this mechanism the blood flows over the hypothalamus and is detected as being low in thyroid level.
What occurs in the second stage of hormone secretion after a low thyroid level is detected?
The hypothalamus will synthesise thyroid releasing hormone which will pass into the anterior pituitary.
In the second stage TRH is released and what does this stimulate the release of?
What is produced as a result ?
TRH stimulates the anterior pituitary which causes the release of the thyroid hormone this causes a production of T3/T4 in the blood.
What does the production of T3/T4 cause?
The production of T3 and T4 increases thyroid level in the blood.
Describe negative feedback in terms of endocrine hormone secretion.
The increased thyroid hormone level is detected decreasing the production of TRH reversing the cycle.
