Cellular Transport Review with answers.doc - Cellular Transport ... - Free Printable

Okay, now I see the final section of the worksheet. It's discussing what happens to plant cells when water leaves them. The text states that "The SHRINKING of plant cells when water leaves the cell membrane pulls away from the cell wall is called ____________" with a blank space for the answer, which is highlighted in yellow. Below that, it says "It happens when a plant cell is placed in a ____________ solution," also with a blank and a yellow highlight. The accompanying diagram shows a graph with time on the x-axis and volume on the y-axis, depicting a decrease in volume over time, which visually represents the shrinking process. This section is clearly asking for the term that describes this phenomenon (plasmolysis) and the type of solution that causes it (hypertonic). Now that I have examined all sections of the worksheet, I will synthesize the information to provide a complete solution.

Based on my analysis of the "Cellular Transport Review" worksheet, here is the complete solution with explanations:

Section 1: Defining Solutions Based on Solute Concentration

This section asks students to label diagrams based on the concentration of solute molecules outside versus inside the cell.

* Hypertonic Solution: A solution with a HIGHER concentration of solute molecules outside the cell than inside. In this case, water will move *out* of the cell, causing it to shrink.
* Isotonic Solution: A solution with the SAME concentration of solute molecules outside the cell as inside. There is no net movement of water, so the cell maintains its normal size.
* Hypotonic Solution: A solution with a LOWER concentration of solute molecules outside the cell than inside. Water will move *into* the cell, causing it to swell.

Section 2: Plant Cells and Turgor Pressure

This section focuses on the effects of water movement on plant cells.

* Turgor Pressure: The pressure inside a plant cell caused by water pushing against the cell wall. This is what makes plant cells firm and gives plants structural support.
* When water enters a plant cell (e.g., in a hypotonic solution), the cell becomes turgid (swollen and firm).
* When water leaves a plant cell (e.g., in a hypertonic solution), the cell becomes plasmolyzed (shriveled and flaccid).

Section 3: Osmosis and Diffusion

This section reinforces the concepts of osmosis.

* When a cell is placed in a HYPOTONIC solution, water moves into the cell by osmosis, causing it to swell or even burst (in animal cells).
* When plant cells are placed in a HYPERTONIC solution, water moves out of the cells, causing the osmotic pressure to decrease and the cells to become plasmolyzed.

Section 4: Plasmolysis

This section specifically addresses the shrinking of plant cells.

* The SHRINKING of plant cells when water leaves and the cell membrane pulls away from the cell wall is called Plasmolysis.
* This happens when a plant cell is placed in a Hypertonic solution.

In summary, the worksheet teaches students about the different types of solutions (hypertonic, isotonic, hypotonic) and how they affect cells through osmosis. It specifically highlights the importance of turgor pressure in plant cells and the process of plasmolysis that occurs when plant cells lose water in a hypertonic environment.