Penn Foster Anatomy & Physiology Study Guide | 100% Correct Answers | Verified | Latest 2024 Version

The nervous system is the body's - control center The central nervous system consists of - brain and spinal cord and their associated structures The peripheral nervous system is comprised of - the nerves traveling from the brain or spinal cord to the target organs and back The somatic nervous system carries out - conscious activities, such as walking, eating, etc The autonomic nervous system performs functions that - don't require conscious thought, such as breathing, blood pressure, and heart rate The basic structural and functional unit of the nervous system is the - neuron or nerve cell 2 Important types of neurons are - sensory neurons and motor neurons Sensory neurons carry signals of - touch, taste, etc to the brain Motor neurons carry instructions from - the brain to the muscles, causing them to move The primary purpose of a neuron is to - transmit an electrical signal that acts either to signal other neurons or to cause a change in a target organ, such as a muscle or gland Depolarization is - the change in membrane potential that occurs when a nerve is stimulatedRepolarization is - the ree