Synaptic Communication Summer

How many synapse in brain

100- 500 trillion

Graded Potentials

Exitatory post synaptic signals and Inhibitory post syanptic signals

Exitatory post synaptic signals

towards -55mv

Inhibitory post syanptic signals

away from -55mv

Axodendritic Synapse

Axon synapsing on dendrite, most common

Axosomatic Synapse

Axon synapse on soma

Axoaxonic Synapse

axon on axon synapse

Dendrodendritic Synapse

Dendrite on dendrite synapse

Event in Excitatory Synaptic Communication 1/7

Nerve impules (Action potential) arrives at pre synaptic terminal

What happens when Nerve impules (Action potential) arrives at pre synaptic terminal

Voltage gated calcium channels are activated

What happens hen Voltage gated calcium channels are activated

Calcium triggers neurotransmitter release

What happens when Calcium triggers neurotransmitter release

Neurotransmitters bind and open post synaptic sodium channels

What happens when Neurotransmitters bind and open post synaptic sodium channels

Sodium enters post synaptic cell

What happens when Sodium enters post synaptic cell

Membrane potential increases in post synaptic cell

What happens when Membrane potential increases in post synaptic cell

Threshold of activation is released and action potential is triggered