Neuron terminates at muscle, gland or another neuron
Junction between two neurons is called a Synapse
Synapses: Electrical and Chemical Synapses
Electrical Synapses: Two neurons are connected by gap junctions
Gap junctions allow charged particles to flow between cells
Chemical Synapses : Most Common Type
Presynaptic Terminal - Synaptic Cleft - Post Synaptic Membrane
Neurotransmitters In Chemical Synapse
Postsynaptic Potential
Neurotransmitter receptors mediate changes in membrane potential
2 Postsynaptic Potentials: EPSP and IPSP
Eg: EPSP
EPSP: Excitatory (Depolarisation)
EPSP and IPSP are graded potential
They can be summated
Temporal Summation
Spatial Summation
Post synaptic potential is a Graded Potential
Graded Potential VS Action Potential
Graded potential depending on the initial stimulus can be summed
Action Potential: All or none phenomenon cannot be summed
Synpatic Potential Recording
Nobel Prize: Nerve Membrane Physiology
Snapshot
No comments:
Post a Comment