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Pre lab Investigation question: What variables affect the passage of molecules through a cell membrane?

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Presentation on theme: "Pre lab Investigation question: What variables affect the passage of molecules through a cell membrane?"— Presentation transcript:

1 Pre lab Investigation question: What variables affect the passage of molecules through a cell membrane?

2 Part I Adding salt solution to Elodea- cellular level _YHakvho&feature=relatedhttp://www.youtube.com/watch?v=VK- _YHakvho&feature=related Adding distilled water – organism level of organism Tmnchttp://www.youtube.com/watch?v=H6N1IiJ Tmnc

3 Propose at least two alternative hypotheses for your observations. (question 4). Submit one hypothesis via your student responder.

4 Some definitions to work with. Solute: a substance dissolved in a liquid Solvent: the dissolving medium in a solution. Concentration: the strength of a solution; number of molecules of a substance in a given volume.

5 Part II-dialysis model Molecule size investigation (2 students/group) Solute concentration investigation (2 students/group) Homework: plf


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