1. Recap What gland produces the Growth Hormone (GH)? What is melatonin?
Where is the thyroid gland located?

2. Endocrine System Homeostatic Imbalances
Ch. 9c

3. Hypo- vs. Hyper- Hypo – Hyper – Less than normal; deficient
Hyposecretion
Deficient hormone secretion
Hyper –
Excessive
Hypersecretion
Excessive hormone secretion

4. Pituitary Gland Imbalances
Hyposecretion of GH (Growth Hormone)
Dwarfism
Body proportions still fairly normal but with a maximum height of 4 feet
Hypersecretion of GH
Gigantism
8-9 feet is common
Most cases of hypersecretion results from a tumor of the affected gland

5. Thyroid Gland Imbalances
Goiters (Hyposecretion)
An enlargement of the thyroid due to an iodine deficiency
Graves’ Disease (Hypersecretion)
High metabolic rate
Rapid heartbeat
Bulging eyes

6. Parathyroid Gland Imbalances
Hyposecretion
Low blood calcium levels irritate neurons
Irritated neurons deliver rapid impulses to muscles causing uncontrollable spasms
Hypersecretion
Massive bone destruction
Bones become very fragile and spontaneous fractures occur

7. Adrenal Gland Imbalances
Addison’s Disease (Hyposecretion)
Peculiar bronze skin tone
Sodium and water are lost from the body causing muscle weakness
Cushing Syndrome
Results from a tumor on the adrenal cortex
Symptoms include a wide “moon face” and a hump ion the upper back
“Moon Face”
“Buffalo Hump”

8. Quick Quiz Name one imbalance of the Parathyroid Gland.
What is one symptom of Cushing Syndrome?
Give the definitions of hypo- and hyper-.