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difference between electrical and chemical impluses

 Electrical Impulse   Chemical Impulse
 1. Origin Brain generates electrical impulseChemical signal may be generated by specific parts in body. For eg. Hormones are produced by specific glands.
 2. DirectionThey travel through axons present in  neurons. It is unidirectionalTravel from synapse to the nerve ending. It is bidirectional.
 3. Speed   Fast   Slow
 4. Area of transmittanceElectrical impulse are transmitted only through cells associated with nervous tissue.Chemical impulse are transmitted throughout the body.
 5. Nature of signal They are not continuous. They are steady and persistent.

 

@Robin & Annu:- Good answers, keep contributing!!

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ELECTRICAL IMPULSE

CHEMICAL IMPULSE

Travels through cell body to axon and along axon to axon ends

Travels through synapse to dendrite

Electrical impulse is a form of electrical energy released by the activity of electrons and other subatomic particles.

chemical impulse is created by the chemical reaction which at the nerve ending
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ELECTRICAL IMPULSE

CHEMICAL IMPULSE

Travels through cell body to axon and along axon to axon ends

Travels through synapse to dendrite

Electrical impulse is a form of electrical energy released by the activity of electrons and other subatomic particles.

chemical impulse is created by the chemical reaction which at the nerve ending

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VERY NICE!

Aradhana, YOU HAVE COPIED MY ANSWER.....

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Type of synapses
Electrical
Chemical
Mode of action
Membranes of neurons are in close proximity. Hence, electrical current flows directly from one neuron to another.
  • Membranes of neurons are separated by fluid-filled spaces called synaptic cleft.
  • Axon terminals have vesicles filled with chemicals (neurotransmitters).
  • Impulse stimulates the movement of synaptic vesicles towards the membrane.
  • Here, they fuse with the plasma membrane, and release their neurotransmitters at the synaptic cleft where they bind with their specific receptors.
  • This binding opens the ion channels, allowing entry of ions which can generate a new impulse.
Speed
Fast
Slow
More information
These are rare.
New potential that they develop may be excitatory or inhibitory
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