This document provides an overview of the biological perspective in psychology and the structure and function of the nervous system. It discusses the nervous system and different types of neurons. It describes how neurons communicate via neurotransmitters at synapses and the role of the central and peripheral nervous systems. Specifically, it details the somatic and autonomic nervous systems and their functions. The document also examines the endocrine system and hormones produced by glands like the pituitary, pineal, thyroid and pancreas that influence behavior.