Synaptic transmission

Question 1

What is the sensory neuron?

Answer 1

• It detects sensations at sensory receptors (eg: pain)
• An action potential travels across the nerve passing along the axon
• the electrical signal is converted into a chemical signal to cross the synapse

Question 2

What is the relay neuron?

Answer 2

• After synaptic transmission, a new action potential forms in the densities.
• This neuron is in the spine and it sends a signal to the CNS and a signal along its axon to the motor neuron

Question 3

What is the motor neuron?

Answer 3

• It detects the signal from the relay neuron by synaptic transmission and passes the signal along its own myelinated axon to stimulate an effector
• An effector could be a muscle in the arm moving it away from the source of pain