Today in bio we did a couple things. The first thing we did was a Diffusion Lab. We took a cellophane tube, which acted as the cell membrane, and we filled it with 20 drops of starch and 5 drops of glucose. We submerged it in 400 mL of water and let the tube sit for 15 minutes. While the tube was sitting, we learned about the cell (plasma) membrane and how it was selectivley permeable. This quicly led back into the lab we were doing. We went back to the lab tables and dipped a piece of tes tape in the water. This proved there was glucose present in the water. Then, we looked at the tube which was purple/blue which meant the starch was still in it. This showed us how the Cell Membrane is selectively permeable by letting the glucose through while keeping the starch in. Tonights homework is to 1) finish the lab questions, 2) finish the enzyme prelab, and 3) STUDY for the quiz on cell parts!
Tomorrows scribe is Sammy K
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