Читать реферат по английскому: "Cell Permeability Essay Research Paper Cell membrane" Страница 2


назад (Назад)скачать (Cкачать работу)

Функция "чтения" служит для ознакомления с работой. Разметка, таблицы и картинки документа могут отображаться неверно или не в полном объёме!

conclude from the molecular weights of the molecules that the way in which the molecules will get into the cell will be first Urea, Ehtylene Glycol, Thiourea, and finally Glycerol. But, one of the most interesting part of the graph is that one can see that Glycerol being the biggest molecule reached hemolysis faster, in less time, than Thiourea being smallest molecule, but this only happens in human and rat red blood cells. This is because the cells in a human and rat blood likes Glycerol and most imporantantly it has its own channel that it can used to get in faster. On the other hand, Thiourea don?t have it?s own channel and it has to diffuse into the cells which will a longer time. In mouse red blood cells don?t have this special Glycerol channel and one can see from the graph that it will the molecule of Glycerol will take longer to diffuse into the cell because it is the biggest molecule.

Part C ? Permeability of cell membrane in relation to fat solubility

The times for hemolysis of rat red blood cells for the alcohols.

Alcohol Time for hemolysis (secs)

methyl alcohol (0.0097 p.c.) 11

ethyl alcohol (0.0357) 8

propyl alcohol (0.156) 2

This compounds enter the cell membrane in relation to its fat solubility, the factor to measure the fat solubility in this case is deteminated by the partitian coefficient. In the table and graph above we can see that even thought, propyl alcohol has the longer length of carbon chain it entered the cell membrane first. The entering of propyl alcohol first to the cell membrane its due to the fact that it has the highest partitian coeffient between the three alcohols presented during this experiment. The highest the partitian coeffiecient for a compound is the highest increase of lipid solubility it has, and as a result it would enter the cell membrane faster. Also it can be said that all of this compound with partitian coefficienct are also non-polar compounds with means that they are compound that have equally amount of electrons being shared.



Интересная статья: Быстрое написание курсовой работы