1. OBJ: Given notes, video, activity sheet SWBAT explain the structuresa and functions of the Endocrine System with 70% accuracy. BRING IN TEXTBOOK DN: HW check- Divisions of the Nervous System Booklet Video: Endocrine System ACT: Introduction to Endocrine System (Notes) Text, read p. 217-221; Work on Endocrine System Booklet. HW: Complete Endocrine System Booklet; INERH Exam, Monday March 23

2. Endocrine System Notes Endocrine System: produces hormones which controls/regulates organ & tissue activities; regulates growth & development. ( keeps the human organ systems in balance / stability / harmony.... homeostasis)

3. Endocrine System Notes Endocrine System Organs: Hypothalamus (middle brain): linked to Nervous System; maintains homeostasis & control of pituitary gland. Pituitary Gland: growth, blood pressure, water balance regulates; signals thyroid gland to produce hormones. Thyroid Gland: produces hormones; controls energy inside cell Parathyroid: regulates blood calcium.

4. Endocrine System Notes

5. Endocrine System Organs: Thymus: helps immune system development Pancreas: controls blood sugar Adrenal (above kidneys): triggers adrenaline during emergency situations; “fight or flight response”. Ovaries: triggers egg development (estrogen); female sexual development (progesterone). Testes: regulates sperm development; male sexual development (testosterone)

6. Endocrine System Notes

7. Endocrine System: controls/regulates → negative feedback The Endocrine System uses a negative feedback loop (like a home thermostat) to maintain homeostasis. Through negative feedback, when the amount of a specific hormone in the blood reaches (rises) to a certain level, the hypothalamus sends a signal to stop the release of that hormone (homeostasis). If the hormone level drops, a signal is sent to the hypothalamus to release the hormone.

8. NEGATIVE FEEDBACK LOOP Hormone

9. Endocrine System Notes