41. Signals from these photosensitive ganglion cells have at least two other roles in addition. 42. It is a photosensitive , colourless gas that cannot be concentrated in pure form. 43. Note that colored dyes can also be incorporated into Type 1 photosensitive anodized aluminum. 44. PhotoSensitive invited twelve new photographers to the collective.45. Adult crabs collected from the vents show photosensitive pigment, but no retinas at all. 46. The retina contains two types of photosensitive cells, the rod cells and the cones. 47. The chemical is photosensitive , with the rash occurring only after exposure to ultraviolet light. 48. In humans, melanopsin is found in intrinsically photosensitive retinal ganglion cells ( ipRGCs ). 49. Rapidly flashing lights may be dangerous for people with photosensitive epilepsy or other nervous disorders. 50. Gum arabic is not photosensitive by itself.