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Nervous System Notes | Coordination and Response Notes 3/5

 Difference between 3 types of neuron function Sensory neuron vs Motor neuron vs Relay neuron or intermediate neuron Sensory - transmit nerve impulse from receptors to CNS Motor - " from CNS to effectors Relay/intermediate - " from sensory neurons to motor neurons across junctions (synapse) Why is cell body so important to neurones? 4 Differences: Motor neuron vs Sensory neuron  Difference between 3 types of neuron function Sensory neuron vs Motor neuron vs Relay neuron or intermediate neuron Sensory - transmit nerve impulse from receptors to CNS Motor - " from CNS to effectors Relay/intermediate - " from sensory neurons to motor neurons across junctions (synapse) Why is cell body so important to neurones? 4 Differences: Motor neuron vs Sensory neuron  Difference between 3 types of neuron function Sensory neuron vs Motor neuron vs Relay neuron or intermediate neuron Sensory - transmit nerve impulse from receptors to CNS Motor - " from CNS to effectors Relay/intermediate - " from sensory neurons to motor neurons across junctions (synapse) Why is cell body so important to neurones? 4 Differences: Motor neuron vs Sensory neuron  Difference between 3 types of neuron function Sensory neuron vs Motor neuron vs Relay neuron or intermediate neuron Sensory - transmit nerve impulse from receptors to CNS Motor - " from CNS to effectors Relay/intermediate - " from sensory neurons to motor neurons across junctions (synapse) Why is cell body so important to neurones? 4 Differences: Motor neuron vs Sensory neuron

 

The nerve

Peripheral nerve vs neuron

(whole thing vs 1 nerve fibre)

Define synapse

  • A junction between 2 neuron
  • A neuron and an effector

 

Difference between 3 types of neuron function

Sensory neuron vs Motor neuron vs Relay neuron or intermediate neuron

Sensory – transmit nerve impulse from receptors to CNS

Motor – ” from CNS to effectors

Relay/intermediate – ” from sensory neurons to motor neurons across junctions (synapse)

 

4 Differences: Motor neuron vs Sensory neuron

 

Direction of transmission of Impulse From CNS to effector From receptor to CNS
Length of dendrone Short dendrons Long Dendron
Length of axon Long axon Short axon
Cell body shape Irregularly shaped Round
Cell body position At the end On the myelin sheath

Define Nerve

A bundle of nerve fibres (axon/  dendron)

Enclosed in a sheath of connective tissue

 

  • Sensory nerve fibre only
    • To conduct nerve impulses from sense organ
  • Motor nerve fibre only
    • ” to effectors
  • Both sensory and motor nerve fibre
    • To and fro (spinal nerves)