Describe Mechanism of Vision in detail ?
Answers
Vision :-
- the ability to see
- sight or eyesight.
- something that you imagine
- a picture that you see in your mind.
____________________________________
Mechanism of Vision :-
☆ The light rays in visible wavelength focussed on the retina through the cornea and lens generate potentials ( impulses ) in rods and cones .
☆ the photosensitive compounds (photopigments) in the human eyes is composed of opsin(a protein) and retinal ( an aldehyde of vitamin A ) .
☆ Light induces dissociation of the retinal from opsin resulting in changes in the structure of opsin .
☆ This causes membrane permeability changes.
☆ As a result , potential differences are generated in the photoreceptor cells .
☆ This produces a signal that generates action potentials in the ganglion cells through the bipolar cells.
☆ These action potentials/impulses are transmitted by the optic nerves to the Visual cortex area of the brain , where the neural impulses are analysed and the image formed on the retina is recognised based on earlier memory and experience.
Answer:
Mechanism of vision:
Photo pigments are composed of opsin (protein) and retinal (an aldehyde of vitamin A).
Light induces dissociation of retinal from opsin.
This change generates action potential in photoreceptor cells.
Nerve impulse travels through bipolar cells and ganglionic cells and optic nerve and reach visual area in brain (in occipital lobe of cerebrum).
HOPE THIS HELPS YOU
PLZZ MARK AS BRAINLIEST ✌✌