Ecotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? In what part(s) of a target cell would you expect to find corticosterone receptors?

Video transcript

Welcome back. Here's our next question. It says, where would you expect to find valdosta rhone receptors in a target cell. When we look over our answer choices, we see that our options are choice A cell membrane B. Cytoplasm, c nucleus. And then we've got choices d any that are combinations of two of them. So we want to think about where would valdosta rone be received in the cell? Even if we can't remember specifically what valdosta rhone does, we can be kind of clued in by the name Valdosta rhone. It's similar to testosterone and that can help us recall that it's a steroid hormone. Um Valdosta rhone is a hormone that helps to balance water and salts and a kidney. It's a steroid hormone hormone which means that it's fat soluble or non polar. And because it's fat soluble it is capable of crossing the cell membrane and because it can do that then it's able to go inside the cell and therefore its receptors can be inside the cell. This is as opposed to water soluble hormones and their messages have to be delivered via receptors on the cell surface since they can't penetrate through the cell membrane due to their polar nature. So let's look at our locations here remembering that Aldo austin is a steroid hormone can have receptors inside the cell. So when we look at our answer choices, we do not need the receptors to be on the cell membrane as you do with water soluble. So we're going to eliminate choice A cell membrane, then we'll also eliminate choice B. Which is both A and B. Since we've eliminated A. When we look at the rest of the answer choices, we see that choice B is cytoplasm and yes, it can be received by receptors in the cytoplasm inside the cell, and choice see the nucleus. It can also be received there in that internal location. So since B and C are both correct, our answer choice will be choice E. Both B and C. So where would you expect to find the valdosta own receptors in the target cell? Choice E. Both B and C. In the cytoplasm and in the nucleus to see you in the next video.