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Ch. 15 The Special Senses

Chapter 14, Problem 31

Describe the response of rhodopsin to light stimuli. What is the outcome of this cascade of events?

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Hello, everyone and welcome to today's video. So which of the following photo pigments are found in rods and are responsible for vision in low light conditions. As answer choice A we have Rhodopsin BS cones, C M cones, D L cones. Well, let's begin by looking at answer choice B which is going to be the S cones. All these S cones are going to contain short wavelength sensitive for photos, which is going to be most sensitive to blue light because we're looking for vision in low light conditions, we're going to be canceling this out. Then we have C which is going to be the M cones. The M cones contain medium wavelength sensitive for photos, which is going to be more sensitive to green light again because we're looking for vision in low light conditions. We're also going to cancel M cones out. And then we have D which is the L cones just like the S cones and the M cones. These L cones are going to contain long wavelength sensitive autopsy, but it's going to be more sensitive to red light because we're looking for low light conditions. We're also going to cancel this out. And then finally, we have a which is going to be Rhodopsin. Now, Rhodopsin is a photo pigment found in rots and this is going to be responsible for vision in these low light conditions. Now, Rhodopsin just like or compared to the other photo pigments that we have in this question, is not involved in color vision and is more sensitive to this longer wavelength of light. Therefore, we're going to be highlighting answer choice a doin as a final answer to this question, I really hope this helped and I hope to see you on the next video.