Learning objectives Know define and describe the general function of the endocrine system,and describe how endocrine glands differ from exocrine glands. Know the conception of Hypothalamus-pituitary axis (下丘脑一垂体轴) Know the conception of feedback regulation (反馈调节) Understand how biochemical testing and imaging are used to diagnose endocrine disease.Learning objectives define and describe the general function of the endocrine system, and describe how endocrine glands differ from exocrine glands