The phosphate head region is polar. Polar substances have a slight negative and positive charge that allows them to chemically interact with a variety of substances.
The fatty acid chains are non-polar meaning they have little to no charge and don't interact with those substances that do have a charge.
In this layer there are several items that are stuck in to allow further access and provide recognition.
Follow this link to a review of the cell membrane in general and then click on highlighted words to follow the trail for new information.
Make sure that you look into the membrane proteins, cholesterol, and carbohydrates that are a part of the cell membrane.
In other news, we observed our osmosis eggs after soaking in vinegar overnight. We noticed that our eggs were without their shell and swollen with vinegar. We also measured our vinegar remaining and saw that 10-60 mL were missing. Since the egg is swollen and the vinegar level is down, we concluded that the vinegar passed into the egg and out of the beaker. If you would like to look at pictures, then click the link above.
See you guys tomorrow!!!