Meaning of Dunham. Celtic name. In Celtic, the name Dunham means - Dark skinned fighter.. Other origins for the name Dunham include - Celtic, Irish.The name Dunham is most often used as a boy name or male name. Celtic Name Meaning - Dark skinned fighter. Origin - Celtic.
eyeball. 1  Photoreceptors are the cells in the retina that respond to light. Their distinguishing feature is the presence of large amounts of tightly packed membrane that contains the photopigment rhodopsin or a related molecule.
The receptors are arrayed along the back of the interior of each eye, in the tissue called the retina. There are two types of cells that act as photoreceptors in the eye: ro â¦ ds and cones.Rods detect only the presence or absence of light without distinguishing between colors, thus giving black and white vision (as at night).here are two types of cells that act as photoreceptors in the eye: ro â¦ ds and cones. Rods detect only the presence or absence of light without distinguishing between colors, thus giving black and white vision (as at night).