Osmosis and diffusion concept understanding for conceptualization

This is a paper that is focusing on the osmosis and diffusion concept understanding for conceptualization. The paper also provides additional information to use in the writing of the assignment paper. Below is the assessment description to follow:

Osmosis and diffusion concept understanding for conceptualization
Osmosis and Diffusion Understanding the concepts of diffusion and osmosis is critical for conceptualizing how substances move across cell membranes. Diffusion can occur across a semipermeable membrane; however diffusion also occurs where no barrier (or membrane) is present. A number of factors can affect the rate of diffusion, including temperature, molecular weight, concentration gradient, electrical charge, and distance. Water can also move by the same mechanism. This diffusion of water is osmosis.

Osmosis and diffusion concept understanding for conceptualization
In this lab you will explore the processes of diffusion and osmosis. We will examine the effects of movement across membranes in dialysis tubing, by definition, a semi-permeable membrane made of cellulose. We will also examine these principles in living plant cells.

Part 1. Observing Osmosis in a Living System, Elodea & RBC If a plant cell is immersed in a solution that has a higher solute concentration than that of the cell, water will leave/enter (circle one) the cell. The loss of water from the cell will cause the cell to lose the pressure exerted by the fluid in the plant cell’s vacuole, which is called turgor pressure. Macroscopically, you can see the effects of loss of turgor in wilted houseplants or limp lettuce. Microscopically, increased loss of water and loss of turgor become visible as a withdrawal of the protoplast from the cell wall (plasmolysis) and as a decrease in the size of the vacuole (Figure 1).

Procedure Obtain a leaf from the tip of an Elodea Place it in a drop of water on a slide, cover it with a coverslip, and examine the material first at scanning, then low power objective and then at high power objective. (IMAGE 10x and 40x) Repeat with a new slide and using a drop of 40% salt solution. Be sure that the salt solution moves under the coverslip. Wait about 5 minutes, then examine as before. Image these cells 40% salt solution.

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