Diffusion and Osmosis - Review

1. Diffusion defined as _____________________________

2. Using the diagram below, defined the following beaker solutions: Isotonic solution, Hypertonic solution and Hypotonic solution.

Beaker 1. ___________ Beaker 2. ____________ Beaker 3.____________

3. Diffusion operates in all environments, but Osmosis can only occur across a ___________ .

4. The driving force behind Brownian movement is ______________

5. As the particle of carmine dye diffusion in the liquid, what is the relationship between the size of the particles and amount of movement? _______________

6. Active transport can only occur in _______________________.

7. As a substance diffuses away from its source the rate of diffusion _____________.

8. As you compare the molecular weights of various substances and compare their rates of diffusion, the larger the molecular weight the ___________ the rates of diffusion.

9. The selective permeability of a cell membrane means that larger molecules are __________ (prevented/permitted) to pass through.

10. In a osmotic gradient, the side which is Hypotonic is the side which will _________ (gain/lose/equalize) solute molecules with respect to the Hypertonic side.

11. Active transport can move materials _____________ (against a concentration gradient/larger molecules too big to fit through the pores/increase rates of diffusion/all of the answers are correct)

In the photo below, the concentrations of potassium permanganate and the associated diffusion are compared.

12. The relationship between concentration and rates are diffusion are: ______________________

In the photo below, the molecular weights and rates of diffusion are compared.

13. The relationship between molecular weights and rates of diffusion are: _______________________

The proces of endocytosis is demonstrated by the Amoeba (below) and a small ciliate.

14. How does endocytosis relate to Osmosis, Active Transport and Diffusion? ________________