Section 1
Overview of the Endocrine System
Define the word hormone and distinguish a hormone from a neurotransmitter. Why is this an imperfect distinction?
Name some sources of hormones other than purely endocrine glands.
Describe some distinctions between endocrine and endocrine glands.
List some similarities and differences between the endocrine and nervous systems.
Discuss why the target-cell concept is essential for understanding hormone function.