Phospholipids Lab Report

652 Words 3 Pages
Introduction An organelle divides the inside form the outside. It helps to maintain homeostasis. Its structure is phospholipid bilayer with associate protein. The phospholipid has a hydrophobic tail, it does not like water, and hydrophilic head meaning it likes water. A bilayer means that there is two layers of the phospholipids the heads stick out and the tails touch each other staying away from the water. The proteins divide the group of phospholipids from each other. There are three variables that effect moving across the cell membrane. First is the solubility, if it is soluble it can easy move across and if it is not then it will have a harder time moving across. The size effects it as well the bigger the object the harder it will be. The smaller it is will make it easier for it to move across. Finally, the electric charge will determine if it is allowed through. If it is neutral is will easily go through if it is changed it will not go through. The second law of thermodynamics states that entropy in a system increases. Entropy or disorder can use the energy to return to order. There is another definition saying materials move from high to low areas. The second law of thermodynamics says order can turn into disorder then with energy be returned to order. Same for areas of …show more content…
Diffusion is high to low it involves no ATP nor does it need protein channels. Osmosis is a type of diffusion, it is the movement of water across a semipermeable membrane. Like diffusion there are no ATP but does need channels. There are a few terms to know when evaluating the levels of the solutes. Isotonic is when the levels are equal compared to the reference. Hypertonic is when the solutes are more than the reference. Hypotonic is less than the solutes from the reference. Another type of movement is facilitated it is when it goes high to low need no ATP and needs channels. Active transport is low to high needs ATP and

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