Chemical Signaling Within the Animal Body - The Endocrine System

Hormones

Endocrine glands Table 35.1a; Table 35.1b; Table 35.1c; Table 35.1d

Major glands of the human endocrine system - Fig. 35.1

Exocrine glands secrete their products into ducts, such as sweat glands.

The Chain of Command - the hypothalamus initiates the production of hormones by the pituitary gland (Fig. 35.6).

How Hormones Work - Fig. 35.2 Movie

Steroid Hormones Enter Cells Fig. 35.3 Movie

cholesterol.

estrogen, progesterone, and testosterone,

anabolic steroids

Peptide Hormones Act at the Cell Surface Fig. 35.4

All the non-steroid hormones are peptide hormones. Examples are insulin and growth hormone.