Long Answer Type
Short Answer TypeMechanism of generation of light-induced impulse in retina,
1. Light induces dissociation of retinal from opsin and results into changes in structure of opsin.
2. It changes in membrane permeability. Thus potential differences are generated in cones cells.
3. It generates action potential in ganglion cells through dipolar cells.
4. These impulses are transmitted by optic nerves to visual cortex area of brain where impulses are analysed.
One Word AnswersShort Answer TypeDistinguish between impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre.
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