1.Dr. Oancea presented evidence that the skin can respond to UV light (in particular, she focused on UVA) by a signal transduction cascade that has some similarities and differences compared to the mammalian visual transduction cascade. Based on her paper, answer the following questions. How does below figure provide evidence that an ion channel may be involved in the skin’s response to UVA stimulation? UV retinal retina retinal 4 100 pA 2 a 3 s retinal retinal: 60-40-20 20 40 60 80 UV: V (mv) Reference: UV light phototransduction activates transient receptor potential Ai ion channels in human melanocytes. Nicholas W. Bellono, Laura G. Kammel, Anita L. Zimmerman, and Elena Oancea