CNS

Apuntes

CNS Central Nervous System --- The Nervous System • A network of billions of nerve cells linked together in a highly organized fashion to form the rapid control center of the body. • Functions include: – Integrating center for homeostasis, movement, and almost all other body functions. – The mysterious source of those traits that we think of as setting humans apart from animals. --- Basic Functions of the Nervous System 1. Sensation • Monitors changes/events occurring in and outside the body. Such changes are known as stimuli, and the cells that monitor them are receptors. 2. Integration • The parallel processing and interpretation of sensory information to determine the appropriate response. 3. Reaction • Motor output. – The activation of muscles or glands (typically via the release of neurotransmitters (NTs)). --- Organization of the Nervous System • Two major initial divisions: 1. Central Nervous System (CNS) • The brain and the spinal cord. • The center of integration and control. 2. Peripheral Nervous System (PNS) • The nervous system outside of the brain and spinal cord. • Consists of: – 31 spinal nerves, which carry i...