nervous system

• nervous system

  • coordinates functions of body systems
  • divided into CNS and PNS
• nervous system

  • coordinates functions of body systems
  • divided into CNS and PNS
• central nervous system

  • or cns
  • parts are the braina and spinal cord
• central nervous system

  • or cns
  • parts are the braina and spinal cord
• brain

  • control center
  • receives and processes sensory info, inhibits responses, stores memories, generate thoughts and emotions
• brain

  • control center
  • receives and processes sensory info, inhibits responses, stores memories, generate thoughts and emotions
• spinal cord

  • connects brain to other nerves of the body
  • conducts signal to and from the brain, controls reflex activities
• spinal cord

  • connects brain to other nerves of the body
  • conducts signal to and from the brain, controls reflex activities
• peripheral nervous system

  • or pns
  • composed of nerves that branch out from the brain and spinal cord to body parts and divided into stomatic and autonomic
• peripheral nervous system

  • or pns
  • composed of nerves that branch out from the brain and spinal cord to body parts and divided into stomatic and autonomic
• divisions of peripheral nervous system

  1. somatic controls voluntary body movements
  2. autonomic controls involuntary actions
• divisions of peripheral nervous system

  1. somatic controls voluntary body movements
  2. autonomic controls involuntary actions
• neuron

  • basic structural and functional unit
  • tranmits electrical signals called impulse across the system and lets a body part respond accordingly
  • impulse or action potential is the sudden change of the cell membrane
• neuron

  • basic structural and functional unit
  • tranmits electrical signals called impulse across the system and lets a body part respond accordingly
  • impulse or action potential is the sudden change of the cell membrane
• parts of a neuron compared to an arm

  1. dendrites; fingers
  2. soma; palm
  3. nucleu; middle of palm
  4. axon; bones
  5. mylin sheath; skin
• parts of a neuron compared to an arm

  1. dendrites; fingers
  2. soma; palm
  3. nucleu; middle of palm
  4. axon; bones
  5. mylin sheath; skin
• dendrites

  • projections that extend from the cell body
  • receives chemical signals from anox terminals of another neuron
• dendrites

  • projections that extend from the cell body
  • receives chemical signals from anox terminals of another neuron
• soma

  • or cell body
  • contains nucleus and most organelles
• process of peripheral nervous system

  1. reception
  2. integration
  3. conduction
  4. transmission
• process of peripheral nervous system

  1. reception gather info or incoming signals which are received and converted to a charge in the membrane potential
  2. integration processes info or a change in membrane potential which initiates action potentials
  3. conduction transmits info or action potentials which are conducted to axon terminals
  4. transmission reaction to stimulus or neurotransmitter which release and transmits a signal to the target cell
• process of peripheral nervous system

  1. reception gather info or incoming signals which are received and converted to a charge in the membrane potential
  2. integration processes info or a change in membrane potential which initiates action potentials
  3. conduction transmits info or action potentials which are conducted to axon terminals
  4. transmission reaction to stimulus or neurotransmitter which release and transmits a signal to the target cell
• soma

  • or cell body
  • contains nucleus and most organelles
• process of peripheral nervous system

  1. reception
  2. integration
  3. conduction
  4. transmission