1. Kellan Tracy and Ben Rasaka
Thyroxine

2. Gland Thyroid Gland Regulates metabolism and Calcium Balance.
Works with the parathyroid gland to control calcium levels
Hormones secreted are regulated by the pituitary gland

3. Functions of Thyroxine
Stimulates the consumption of oxygen and therefore controlling the metabolism of all cells in the body.
Metabolism is the chemical processes that occur within a living organism in order to maintain life.

4. Positive or Negative Feedback?
Negative- decrease the thyrotrophin secretion from the pituitary gland
Positive- effects the hypothalamus stimulating the secretion of thyrotrophin inhibitory factor

5. Hypo-Hyper Secretions
Hyperthyroidism- over production of hormones thyroxine (T4) and triiodothyronine (T3)
Tumors in the ovaries and testes
Graves disease
Hypothyroidism- under production of hormones thyroxine (T4) and triiodothyronine (T3)
Depression
Sensitivity to coldness

6. Goiter Enlargement of the Thyroid gland.
Caused by Hypo and Hyperthyroidism.