The nerve cells that transmit electrical impulses between sensory neurons and motor neurons
SENSORY NEURONS
The nerve cells that transmits electrical impulses from receptors to the CNS
MOTOR NEURONS
The nerve cells that transmit electrical impulses from the CNS to effectors.
SYNAPTIC TRANSMISSION
The synapse is the gap between two neurons. Here, small vesicles called neurotransmitters diffuse across.
TYPES OF NEUROTRANSMITTERS
INHIBITORY = ‘switches off’ eg) serotonin and GABA. The neurotransmitter released increases the negative charge. The postsynaptic neuron is less likely to fire an electrical impulse.
EXCITATORY = ‘switches on’ eg) dopamine and noradrenaline. The neurotransmitter increases the positive charge. The postsynaptic neuron is more likely to fire an electrical impulse.
