This document contains figures and descriptions of various endocrine system functions including hormone action, the hypothalamus and pituitary gland, insulin and glucagon regulation of blood glucose, the adrenal glands, thyroid hormone secretion feedback, and calcium regulation in blood. The content discusses endocrine functions and homeostatic control systems in the human body.

2. Endocrine Functions: Hormones Figure 13.1

3. Steroid Hormone Action on a Target Cell Figure 13.2

4. Nonsteroid Hormone Action on a Target Cell Figure 13.3

5. Role of Negative Feedback Loops Figure 13.4

6. Hypothalamus and the Anterior Pituitary Gland Figure 13.7

7. Roles of Insulin and Glucagon in Regulating Blood Glucose Figure 13.10

8. Adrenal Glands: Medulla Figure 13.11

9. Negative Feedback Control of Thyroxine Secretion Figure 13.13

10. Homeostatic Regulation of Blood Calcium Concentration Figure 13.15a

11. Homeostatic Regulation of Blood Calcium Concentration (cont.) Figure 13.15b

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