• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Investigating factors that affect osmosis in plant tissues.

Extracts from this document...

Introduction

Investigating factors that affect osmosis in plant tissues Introduction Definition- Osmosis is the net movement of water molecules from an area of low water potential to an area of high water potential through a semi-permeable membrane. The two containers above are of equal volume and are separated by a membrane that allows free passage of water, but totally restricts passage of solute molecules. Solution A has 3 molecules of the protein albumin therefore has a high concentration and Solution B contains 1 albumin molecule therefore has a lower concentration. ...read more.

Middle

Reverse osmosis When a semi permeable membrane separates two water volumes (or other solvent), water will flow from the side of low solute concentration, to the side of high solute concentration. The flow may be stopped, or even reversed by applying external pressure on the side of higher concentration. In such a case is known as reverse osmosis. The Consequences of Osmosis to plant cells: Plant cells always have a strong cell wall surrounding them. When the take up water by osmosis they start to swell, but the cell wall prevents them from bursting. ...read more.

Conclusion

Turgidity is very important to plants because this is what makes the green parts of the plant "stand up" into the sunlight. When plant cells are placed in concentrated sugar solutions they lose water by osmosis and they become "flaccid"; this is the exact opposite of "turgid". If you put plant cells into concentrated sugar solutions and look at them under a microscope you would see that the contents of the cells have shrunk and pulled away from the cell wall: they are said to be plasmolysed. When plant cells are placed in a solution, which has exactly the same osmotic strength as the cells they are in a state between turgidity and flaccidity. We call this incipient plasmolysis. ("Incipient" means, "about to be"). ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Life Processes & Cells section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Life Processes & Cells essays

  1. Osmotic pressure

    size affects the osmosis and the rate of how it occurs. If the size of the potato chip were quite small, there would be a smaller surface area for osmosis to occur and it would take longer for the concentration of the solutes inside the potato cell and in the solution to become equal (isotonic).

  2. How Does Osmosis Affect Plant Cells?

    Evaluation: This experiment was not a great success. I didn't gain the best results possible and haven't used this preliminary work to its full potential as an aid for my main experiment. I was able to gain knowledge of what times were best to leave the potato cuttings in the

  1. Factors Affecting Osmosis.

    length will also double' also cannot be proven due to obtaining no results for 0.5M and 1.0M sucrose solution. MODIFICATIONS After carrying out my pilot experiment I can see by the results and they way my experiment was carried out that there are certain modifications I would like do to improve my experiment further.

  2. The Consequences of Osmosis

    As well as the potato I could have found a more accurate way to measure out the solutions and to determine the molar concentrations. Perhaps I could have used a burette. This would ensure that I have an accurate amount of fluid in each test tube.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work