A01

• What are the 2 main sub-systems of the nervous system?

  Central nervous system and peripheral nervous system
• What is the central nervous system (CNS) made up of?

  1. Brain

  2. Spinal cord
• What is the peripheral nervous system (PNS) made up of?

  Millions of neurones which carry electrical impulses to and from the CNS
• What are the 2 sub-divisions of the PNS?

  1. The Autonomic nervous system (ANS) = parasympathetic and sympathetic nervous system

  2. The somatic nervous system (SNS)
• What is the role of the somatic nervous system?

  To control voluntary movements and deals with skeletal muscles
• What is the role of the autonomic nervous system?

  To control involuntary/automatic movements and deals with smooth muscles and glands
• What is the autonomic nervous system sub-divided into?

  Sympathetic and parasympathetic systems
• What is the role of the sympathetic nervous system?

  To increase bodily activities and mobilise body for fight or flight
• What is the role of the parasympathetic system?

  Restores the body to resting levels and conserves energy
• What is the role of the brain and the spinal cord in the CNS?

  - Brain = governs our conscious awareness and coordinates sensation, intellectual and nervous activity

  - Spinal cord = receives info to and from brain and responsible for reflex actions