Thyroid + Parathyroid Flash Cards

Question	Answer
Describe the hierarchical control of thyroid hormone.	The hypothalamus generates thyroid releasing hormones (TRH) into the anterior pituitary which then releases thyroid stimulating hormone (TSH). It then acts on the thyroid to generate thyroxine and eventually T3 and T4
What is the action of calcitonin?	It was supposed regulate the calcium ions level in the plasma by stimulating the bone to absorb the calcium.
Describe the process of thyroid hormone synthesis.	Iodide from diet goes in the bloodstream. It goes in the co-transporter via the sodium channels. It then gets diffused across to the colloid where it gets converted to iodine by thyroid peroxidase. It then bind to thyroxine and goes back to the follicular cells via endocytosis and the lysosome breaks it apart into T3 and T4.
What are the actions of the thyroid hormones? What role does it play in neonatal development?	It works almost similar as glucagon. It stimulates the heart and the body to undergo gluconeogenesis etc. In neonatal, it repairs the skin and the epithelial linings.
What can cause hyperthyriodism/hypothyriodism?	Most of the time the cause is autoimmune response disorder.
Compare the actions of parathyroid hormones with those of calcitonin	Parathyroid hormones are a direct opposite of calcitonin whereby it increases the plasma calcium ions level.

Resource summary

	Created by Daniel Elandix G over 10 years ago