What are two principal chemical classes of hormones
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which of the following hormones that target principal cells
1. What are the two classic divisions of the endocrine system?
2. What are some non-classical examples of organs with hormone function?
3. Based on their chemical composition, there are several types of hormones. List the different types and give examples of each.
4. What are pheromones?
5. Discuss how hormones elicit an action on a target cell. What are the differences in how the various types of hormone act?
