CIE A Level Biology复习笔记15.1.2 The Nervous System

• The human nervous system consists of the:
  • Central nervous system (CNS) – the brain and the spinal cord
  • Peripheral nervous system (PNS) – all of the nerves in the body
• It allows us to make sense of our surroundings and respond to them and to coordinate and regulate body functions
• Information is sent through the nervous system as nerve impulses – electrical signals that pass along nerve cells known as neurones
• A bundle of neurones is known as a nerve
• Neurones coordinate the activities of sensory receptors (eg. those in the eye), decision-making centres in the central nervous system, and effectors such as muscles and glands

The human nervous system

The nervous system & the endocrine system table