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Recap

Recap . What gland produces the Growth Hormone (GH)? What is melatonin? Where is the thyroid gland located?. Endocrine System Homeostatic Imbalances. Ch. 9c. Hypo- vs. Hyper-. Hypo – Less than normal; deficient Hyposecretion Deficient hormone secretion Hyper – Excessive Hypersecretion

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Recap

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  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 – • 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-.

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