Homeostasis and Raisins

About homeostasis. Who can tell me what homeostasis means? Come on. It means. Homeo. What do you think home means? I think it means. ..What do you think home sounds like? it sounds like lending things and split things together. Not quite. Homeo means the same and stasis means stable. So I'm going to be talking about keeping our body and our internal environment stable and the same. And what about osmosis? What I'll tell you, osmosis means the movement of water. So that's what we're going to be observing today. Observing water moving into these raisins. The raisins want to be, like an analogy of our cell. And we know that our cell is the basic unit a lot. Our body is made up of billions of cells that perform particular functions. So the first thing you'll need is a soap, water, two plastic cups, raisins, and a spill. Okay, so my measuring are a little off. So I'm going to kind of link it. I'm going to do about one cup of distled water in this cup. And I'm just going ahead and do it. When I do that at the same time, and then the next room will just do one cup of regular water. Now the cup with regular water, we're going to add two spoons of salt. That's one. Make it a minute. And then that's two. Let's give it a stir. The one we have no salt. And the other one we have two tablespoons of salt. Let me borrow these raisins. Let's settle that soda. So this one here, I'll go in, I'll add about three. So we can flu see my what happens. And then we'll add three in here. Now we have to wait about 20 minutes and observe what happened with each of the raisins. So let's sweat 20 minutes and we'll be back with you. There you go. Okay, so we're back after the 20 minutes we're waiting for the raisins to be in the steel water and then raisins in the salt tap water. So I forgot to show you what the raisins look like before and you know raisins varies in different sizes. So come closer so you can see what the raisins look like before or the average size of most raisins. Okay, so what we're gonna do first is I'm gonna get to see raisins out of these salt water. So let's do that. Okay. Here they go. The ones that are not on the water. Simple rice. Okay, now here's the one. So here are the ones. They came out of the salt water. They look the same. They do, so I hope you let them stay in there long enough. From that let's do the raisins. They can be playing distilled water. So here are the ones with distled. So, overall, this one here is probably a real small one when I put it in there. But I can tell that it's filled with water. These here, as you can see, especially this one is very much bigger. Than the rest of them. So based on this, what we did, what can you tell me about the difference? What can you tell about the difference? I can tell that you melt the raisins in the salt water. Okay, so what were you saying about what differences you know this was between the raisins? I would say that the ones in the salt water, they got smaller and the ones in the regular order the distled the tiny water, they got bigger. Hey, very good. So that's what we noticed and we know that more like to go with their more particle. And so they're more particles in the raisins so the water's going to go in the razor. So that's why that these raisins got bigger than these here. They kind of shriveled up a little bit. Maybe we had to let them a little longer, maybe, or overnight. We would have truly seen a big difference. But yeah, so we used to raise and remember as our cells. So we know that our cell membrane. Our cell membrane is very important. It's like the officer or a gate. You want to keep certain things out. If we don't need water, ourselves going to prevent that water from coming into our cell, because if too much water coming ourselves, it can burst, and I'm not enough water, it can shrivel up. So I've also very important at the cell membrane is important for maintaining homeostasis. And we sent home your main split. Hold me on me. Hold me to me saying the same. Okay, any questions? What if you add what if you add salt in the distilled water and raisins? Hip hop. My question was, what if you add distilled water and salt together and then pull up the raisins in there? What's going to happen? What we're going to turn to the steel water. And to stop water, so we put the raisins in there, it'll still be salt war. Okay, that's not. And so the water's got to go with there are more solutes. So if we put all of that put enough salt, which I think I did, then we know that raisin is going to shrivel up. Because water likes to go where they're is more solute particles. That's it. Have a nice day. That miss Harris. Bye.