I Can Explain - The importance of the surface area to volume ratio! - Part ii - By m.w.clark

the importance of surface area to volume ratio part II. in the previous episode I showed you a way to calculate these surface area to volume ratio, and as you got smaller bigger to smaller, you actually increase the surface area that is exposed to the outside world relative to the volume of the sphere. this surface area to volume ratio turns out to be very important in chemical and biochemical reactions it even has influence on the different sizes of mammals and how they determine their metabolic rate. this two seems like a kind of difficult concept to visualize but strangely enough you actually have been exposed to this concept as a little kid experiences can be sugar Pixie Stix as opposed to lollipops many people prefer Pixie Stix because they desolve very quickly in your mouth and the arvida granulated sugar with a little flavor in them people prefer a lollipop this particular type of lollipop is a rock candy lollipop is crystallized sugar so you already know what going to happen but the results going to be but we're going to do an experiment because that science to see which dissolves faster get a couple water so here is a half teaspoon v pixie stick granulated sugar overhears a half a teaspoon the rock can be the solid candy now we're going to done each one into couple water and see what's happe you already know what the result is but we do experiments to confirm what we think's going to happen as you can see the pixie stick almost immediately dissolved whereas the rock candy is still sitting here very slow the dissolving so even after five minutes the rock and is only starting to disk the importance %uh this manipulation a surface area to volume ratios is so essential in biology I set up another demonstration help you understand its importance green bowls are doing one of the strategies we talked about to increase the surface area of a sphere and that is the gets more as the diameter above the spears get smaller the surface area to volume ratio change it actually increases so this has more surface area to volume man and this has more surface area to volume this third one is actually doing something a little extra you see these finger-like projections occurring here here that actually is increasing the surface area as opposed to if it was us moves beer you find these actual finger-like projections in nature particularly in the cells that the digestive system there are involved in absorption the surface area of the digestive system has these convolutions these fools which are called feel i that increases the surface area the gastrointestinal tract so these things can be really here you see model of the human brain and this is that spear that had the thing like projections that increase the surface area and you can seem to be through valleys and falls in the human brain the human brain is in fact doing with them thing its increasing its surface area to volume in the school by putting in more fall if you compare human brain to a rat brain you actually see the rat brain doesn't have any false in its review cortex it's actually very smooth so this actual wrinkly major at the human brain does in fact has something to do with intelligence but that's something we'll get to leader in so so at your own preference you instant gratification would you want and I sugary experience for a long time your prefered strangely enough befell depending on what befell needs it also manipulate this surface to carry a phone ratio it depends in science biology particularly love it