1. Importance of the Endocrine System

2. Hormones
Chemical regulators produced by cells that affect cells in another part of the body.
Produced in glands and are secreted into the blood.

3. Chemical Control Systems
Nervous system & endocrine system work together to control organs & tissues.
Nervous system  rapid, short-term adjustments.
Endocrine system  slower, long-term adjustments.

4. Chemical Control Systems
The hypothalamus regulates the pituitary gland through nerve signals.
The pituitary gland stimulates the endocrine glands which secrete hormones that affects the hypothalamus.

6. Chemical Signals: Steroid and Protein Hormones
Steroid Hormones
Made from cholesterol.
Fat soluble.
E.g., sex hormones and cortisol.
Protein Hormones
Made from amino acids.
Water soluble
E.g., insulin and growth hormones.

7. Steroid Hormones

8. Protein Hormones

9. The Pituitary Gland

10. The Pituitary Gland Referred to as the “master gland”.
Posterior lobe stores and releases hormones produced by the hypothalamus.
Anterior lobe produces its own hormones, but the release is regulated by the hypothalamus.