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Question
Distinguish between the following pair:
Nerve impulse and flow of electricity (transmission and speed)
Solution
| Nerve Impulse | Flow electricity |
| The sodium-potassium pump transmits nerve impulses across axons by polarising and depolarising Na+ ions. Nerve impulses move at a speed of 100 m/sec. | Electricity flows through wires as electrons move between two points with different potentials. Electricity is conducted through wires at a speed of 1,50,000 km/sec. |
RELATED QUESTIONS
Draw a labelled diagram of the following:
Neuron
Fill in the blank:
The neurons carrying impulses from the brain to the muscles are called _______________________.
Define the term Neuron.
What are the advantages of having a nervous system?
The action potential occurs in response to a threshold stimulus; but not at sub-threshold stimuli. What is the name of the principle involved?
At the end of repolarization, the nerve membrane gets hyperpolarized. Why?
Which nerves transmit impulses from the central nervous system towards muscle cells?
Rearrange the following in the correct order of involvement in electrical impulse movement-
Synaptic knob, dendrites, cell body, Axon terminal, Axon
Name the following:
Three types of nerves.
Give reason:
Neurotransmitters are broken down by an enzyme just after passing an impulse from one neuron to the other.
