Neurons

• Nervous system (CNS)?


  Nervous System -> CNS --> Brains + Spinal Cord
• Nervous System (PNS) Somatic?

  Nervous system --> Peripheral nervous system --> Somatic nervous system --> sympathetic
• Nervous System (PNS) autonomic?

  Nervous system --> Peripheral nervous system --> autonomic nervous system --> parasympathetic
• Brain?


  4 lobes - occipital (visual information) frontal ( abstract thought and logic) Parietal (spatial awareness) and temporal ( auditory information)
• Spinal cord?


  sends messages from the brain to the rest of the body. responsible for reflex actions
• Somatic and sympathetic nervous system?

  somatic: sensory information from the outside and muscle movement. Sympathetic: fight or flight impulses travel to target organ
• Autonomic and parasympathetic nervous system?

  Autonomic: control involuntary internal process e.g., breathing Parasympathetic: cools down the body, lowers heart rate and blood pressure
• Sensory neurons?


  Found in receptors, send messages to the brain from spinal cord, impulses reach the brain as sensations
• Relay neurons?


  shorter, found between the sensory and motor neurons, quick transmission brain and spinal cord
• Motor neurons?


  found in the CNS. muscle movement, when stimulated release neurotransmitters. binds to receptors trigger movement.
• Myelin sheath?


  insulates the axon so electrical impulses are kept in
• Dendrites?


  connected to cell body and receive signals from other neurons
• Axon terminal?


  connects neurons
• Action potential?


  info from the axon as electrical impulses
• Vesicles?


  Action potential > reaches the vesicles (In the axon terminal) > vesicles then release neurotransmitters.