2.82 Communication

• Motor Nerve (Neurone)
• Links coordinators with effectors
• Around a meter long
• Has tiny branches at each end
• Has long fibers at each end
• To carry the electrical impulses from the cell body to the Synaptic  knob
• Connected to the muscle
• Mammals- The axon is surrounded by a scwhan cell
• Contains fat to increase the speed of the nerve conduction
• Endocrine System
• Endocrine Gland 
• Produces hormones
• Can be Proteins/Steroids
• Secreted in to the blood
• Arrives at the "Target organ/tissue"
• May have multiple targets
• May have multiple effects
• Endocrine gland (Adrenal gland) > Blood (Adrenaline) > Target Tissue (Heart)
•                                |Nerves                                    |Hormones                      
  Speed of reaction     | fast                                        |slow                              
  Type of transmission|Chemical signal                       |Electrochemical signal
• Specificity                |Can be a few/many body parts|Affects target cells/organs