Chapter 43, Problem 10TYU

Summary Introduction

To describe: The relationship of the animals such as flatworm, crayfish, and elephants on the basis of the presence of opsin in the photoreceptors.

Introduction: Photoreceptors are the sensory receptors present in the eye that detect light. These photoreceptors absorb light energy and cause a change in the action potential. Certain pigments present in the receptors called rhodopsin are sensitive to light and help in signal transduction.