AIM: How is the cell membrane “selectively permeable?” How do molecules move across the membrane?
CLASS DAYS TIL REGENTS: 24
Today we talked about transport across the membrane. We also looked at the second part of the State Lab. Osmosis in an onion cell will be important to know for the June Regents.
If an onion (plant) cell is placed in salt water, the cell membrane will shrivel as water moves out of the cell. The cell wall will STAY THE SAME.
If an onion (plant) cell is placed in distilled water, water will move into the cell and the membrane will expand.
[gview file=”https://www.whsad.org/wp-content/uploads/2014/05/3-Transport-Onion-PP.pptx”] [gview file=”https://www.whsad.org/wp-content/uploads/2014/05/3-Transport-Onion-Cell-Selectively-Permeable.docx”] [gview file=”https://www.whsad.org/wp-content/uploads/2014/05/3-Transport-Onion-REGENTS-practice-questions.docx”]