NERVOUS SYSTEM

• NEURON: is the basic unit of

  nervous system. It transmits impulses to and

  from the various parts of the

  nervous system.
• Sensory Neuron: receive information and

  send impulses to the

  spinal cord or brain.
• Motor Neurons: it conducts impulses from

  the brain or the spinal cord

  to the muscle or glands

  throughout the body.
• Interneurons Neurons: These are scattered

  throughout the brain and

  spinal cord, relay impulses or

  information from the sensory

  neuron to the motor neurons.
• Synapse: The space between the end of a

  nerve cell and another cell.
• Nissl Bodies: also known as Nissl or tigroid substance is a large granular body found in neurons.
• Axon: a neuron lacking a Nissl body. to carry efferent (outgoing) action potentials and conduct nerve impulses away from the cell body to a synapse.
• Myelin Sheath: greatly extended and modified plasma membrane wrapped around the nerve axon in a spiral fashion.
• Nerve Fiber: portion of a nerve cell (neuron) that carries nerve

  impulses away from the cell body.
• Fiber Tract: a type of white matter tract that connects the cortex with other areas in the CNS.
• Dendrites: appendages that are designed to receive communications from other cells.
• Acetylcholine: carries signals

  from motor neurons to the

  body’s skeletal muscles.
• Norepinephrine: plays an

  important role in how our body

  responses to stress.
• Dopamine: is related to muscular

  activity;

  Serotonin: operates in

  bodily functions such as mood

  regulations, consciousness and

  emotions.
• Melatonin: regulates sleep and wake

  cycles.