Science Reviewer

• Important in maintaining homeostasis of the body
• Connect all of the body parts.

  Nervous System
• Transmit signals from one part to another
• Regulates body's responses to stimuli
• Two types of Nervous System

  Central Nervous System

  Peripheral Nervous System
• Central Nervous System is composed of brain and spinal cord
• The peripheral nervous system consists of nerves that connect the central nervous system with other organs, muscles, glands, etc.
• Serves as the main processing center of the entire nervous system

  Brain and Spinal Cord
• It organize and distribute information to the body.

  Brain
• Brain has 3 major parts

  Cerebrum

  Cerebellum and

  Brain Stem
• Largest part of the brain

  Cerebrum
• Controls activities and thoughts

  Cerebrum
• Interpreting, reasoning, emotion and learning

  Cerebrum
• Located under the cerebrum

  Cerebellum
• Controls posture, balance and motor coordination

  Cerebellum
• Cerebellum controls what?

  Posture, balance and motor coordination
• It connects the brain and spinal cord

  Brain Stem
• It controls automatic functions (Breathing, Digestion, Heart Rate and Sneezing)

  Brain Stem
• Serves as channel for signals between brain and the rest of the body

  Spinal Cord
• Controls simple musculoskeletal reflexes without input from the brain Spinal Cord
• Connect the CNS to the organs and limbs

  Peripheral Nervous System
• Two divisions of PNS are

  Somatic and Autonomic
• Associated with the voluntary control of body movements

  Somatic
• Sensory and Motor

  Somatic
• Also known as Afferent

  From senses to brain

  Sensory
• Also known as Efferent

  From brain to muscles

  Motor
• Associated with the involuntary control of body movements

  Autonomic
• Activated when the body is in stress

  Sympathetic
• Maintains body function and restores the body to normal or relaxed mode

  Parasympathetic