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Choose the incorrect statement
Option: 1
All the nerve fibres carry information in the form of the nerve impulse
Option: 2
The interior of the axon is filled with extracellular fluid
Option: 3
Generally, the solutes in and axoplasm are in ionic form
Option: 4
The electrical events in the nerve fibres are governed by differential permeability of the axolemma to sodium and potassium ions.
Answers (1)
Introduction to Nerve Impulse -
Nerve Impulse
- All the nerve fibres carry information in the form of the nerve impulse.
- The nerve impulse is the sum total of physical and chemical disturbances created by a stimulus (electrical, chemical or mechanical) in a neuron or nerve fibre which results in the movement of a wave along the nerve fibre.
- The nerve fibre or axon is like a cylinder.
- The interior of the axon is filled with axoplasm (i.e., the cytoplasm of the nerve cell)
- The exterior of the axon is covered with a thin membrane, the axon membrane or axolemma.
- Axolemma is selectively permeable for eimple organic and inorganic molecules
- The axon is immersed in the extracellular fluid (ECF).
- Through axolemma movement of solute takes place between the axoplasm and ECF.
- Generally, the solutes in ECF and axoplasm are in ionic form.
Hence, the correct option is b.
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