Chapter 40, Problem 5MC

Summary Introduction

Introduction:

The retina detects light and generates action potential within optic nerves. The photoreceptors cells are called as rods and cones due to their shapes. These are present at the rear of the retina. Photoreception starts when the photopigments absorb light that generates chemical reactions and produces receptor potentials within photoreceptor cells. Several layers of neurons are present between the absorbed light and the photoreceptors, which triggers signals from photoreceptors. Ganglion cells are located in the vitreous humor; its axon composes the optic nerve. These cells change signals from the inverting neurons and the photoreceptors into action potentials.