Class 6

   Today in class we discussed in depth the components, functions and parts of a cell(the semi permeable membrane). We learned about the phospholipid bilayer that only allows certain molecules to pass through. Proteins act as a "gate" that transport molecules through. There are different kinds of passing such as transport, enzymatic activity, signal transduction, and cell-cell recognition. There are Glycol proteins that are integral proteins which help with the cell membrane and cell-cell recognition. Cholesterol allows the membrane to be fluid. Water wants to reach the higher concentration so the concentration solute needs to be the same. Hydrophobic molecules can get across the bilayer but polar ones can't. We also talked about plant cells and their differences with human or animal cells. Plant cells contain rigid walls and do not burst as easily as animal cells. Mr. Quick explained the isotonic, hypertonic, and hypotonic variables in cells. We also talked about passive and active transport of molecules. Active uses energy (ATP energy) where as passive has channels and carriers. Size and polarity influence the transport in diffusion and osmosis.

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    Then we discussed the House Case #1 that was assigned to us for homework. The Case gave information on an 18 year old boy who is a cross country runner. one day after practice he started to have a severe headache followed by vomiting, fatigue and confusion. He was sent to the emergency room. We had to predict a possible diagnosis with the little information we had. I initially believed he had a heat stroke or dehydration. Mr Quick let the students ask questions about the boy so we could make an accurate diagnoses. We soon found out that the boy previously drank gallons of water before practice so he could not have dehydration.Then Mr. Quick gave us the test results of the boy when he was in the hospital. I found out that his sodium level was low so I concluded that it was overhydration.