Give a brief account of Mechanism of vision.
Answers
Answer:Mechanism of vision is controlled by the photoreceptor which is present in the rod cell of Retina
Explanation:
vision is one of most important sensesory response of human body.Retina present in the inner portion of eye rhodopsin pigment wich contain photoreceptor that help in our visual perception.Rodopsin is a pigment that consist of opsin and chromophore called 11 cis retinal.When light strikes our eyes at that time the photoreceptor is activated resuting in the bleaching of rhodopsin to bathorodopsin then to lumirodopsin and last to metarodopsin 1 and metarodopsin 2.
The activated photoreceptor inturn helps in the stimulation of phosphodiesterase an enzyme which help in the formation of 5 prime GMP from cyclic GMP.The lowering of cellular cGMP level causes hyperpolarization by closing sodium ion channel.