science ( NERVOUS SYTEM)

• nervous system is a collection of organs that controls and coordinates functions throughout the body and responds to internal and external stimuli.
• specialized cells carry messages from one cell to another.
• messages carried by nervous system are electrical signal called impulses.
• cells that transmit these impulses are called neuron.
• 3 types of neurons 1. Sensory 2. Motor 3.Interneurons
• Sensory: carry impulses from sense organs to the spinal cord and brain.
• Motor: carry impulses from the brain and spinal cord to muscles and glands.
• Interneurons: connect sensory and motor neurons and carry impulses between them.
• BASIC FUNCTIONS OF NEURON 1. receive signals 2. integrate incoming signals 3.communicate signals to target cells.
• A.Dendrite

  B.Soma

  C.Nucleus

  D.Axon

  E.Myelin Sheath

  
• space between neurons

  Synapse
• relays messages, processes and analyzes information

  central nervous system
• receives information from the environment and relays commands from the CNS to organs and glands

  Peripheral nervous system
• memory,judgment,inhibitions,personality

  frontal lobe
• long term memory, auditory processing

  temporal lobe
• vision processing


  occipital lobe
• sensory integration

  parietal lobe
• main communications link between the brain and the rest of the body

  spinal cord
• transmits impulses from sense organs to the CNS

  sensory division
• transmits impulses from CNS to muscles and glands

  motor division
• regulates conscious controlled activities

  somatic nervous system
• regulates activities that are automatic or involuntary

  autonomic nervous system
• responsible for increasing activity in most systems

  sympathetic
• responsible for slowing activity in most systems

  parasympathetic