The document discusses homeostasis and the nervous and endocrine systems. It explains that homeostasis involves the body self-regulating through the nervous system and endocrine system to maintain equilibrium. It then provides details on the structure and function of the nervous system, including neurons, synapses, neurotransmitters, and the central and peripheral divisions. It also discusses the endocrine system, hormones, and how hormones affect tissues in the body.

1. Homeostatic Systems and Drugs Chapter 4

2. Homeostasis Internal and external changes in the environment Body self-regulates via Nervous system & Endocrine system Equilibrium

6. Sending Messages by Neurons

8. Common Neurotransmitters alcohol, Valium-type barbiturates cognition sedation relaxation drowsiness depression inhibitory GABA amphetamines, Cocaine euphoria agitation paranoia altered inhibitory- excitatory Dopamine Drugs of Abuse CNS Changes Type of Effect Neurotrans-mitter

9. Common Neurotransmitters (continued) narcotics mild euphoria block pain inhibitory Endorphins tobacco, nicotine mild euphoria excitation insomnia excitatory- inhibitory Acetylcholine LSD sleep relaxation sedation inhibitory Serotonin

12. Neurons

16. Drug Receptors (continued)

18. Drug Receptors (continued)

24. Central Nervous System Structure

27. Autonomic Nervous System Structure

30. Introduction to the Endocrine System (continued)