Pre-Test
	Concept 45.1  The endocrine system and the nervous system act individually and together in regulating an animal's physiology
	Concept 45.2  Hormones and other chemical signals bind to target cell receptors, initiating pathways that culminate in specific cell responses
	Activity: Overview of Cell Signaling
	Activity: Peptide Hormone Action
	Activity: Steroid Hormone Action
	Concept 45.3  The hypothalamus and pituitary integrate many functions of the vertebrate endocrine system
	Concept 45.4  Nonpituitary hormones help regulate metabolism, homeostasis, development, and behavior
	Investigation: How Do Thyroxine and TSH Affect Metabolism?
	Activity: Human Endocrine Glands and Hormones
	Concept 45.5  Invertebrate regulatory systems also involve endocrine and nervous system interactions
	Chapter Review
	Self-Quiz
	Activities Quiz
	Chapter Quiz

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