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

Investigation into Haemolysis.

Extracts from this document...


Friday 3rd January 2003 BTEC National Diploma In Health Studies Roy Parker, Investigation into Haemolysis Hypothesis In this assignment I am going to be investigating the effects of osmosis on red blood cells. My hypothesis is that the solution with the highest concentration of water will be the 'strongest' colour. The reason why I think this is because with osmosis the more hypotonic the environment is around the cell the more likely it is too burst. Health and safety considerations The following is health and safety considerations; I used during my investigations- * Never point test tubes in the direction of a fellow student or at yourself. * It is your responsibility to ensure suitable protective clothing is worn during practical work (for example, a lab coat). * Protective eyewear must always be worn when you are working with any type of chemical. * The surrounding floor area and space on the work bench must be free of all work, coats and bags * The bench space is wiped after use. * Make sure the sink is free from any obstructions and is clean once you are finished. ...read more.


The reason for this is because water can enter and leave the cell easily. The direct result of this is that there was sediment at the bottom of the test tube. Test tube seven on the other hand has a higher concentration (than test tube six) and is hypertonic, which means there is a high concentration, so water leaves the cells (defibrinated blood cells), the cell shrunk and settled at the bottom of the test tube. Analysis of health and safety issues The following are explanations of why we certain safety precautions (listed on page 1) were followed. The reason why you never point test tubes in the direction of a fellow student or at yourself is in case of accident and potential harm to anyone who is a part of the experiment. There is the possibility of spillage of chemicals or the test tube is broke To ensure chemicals are not spilled onto clothing, a lab coat should always be worn preventing any irritation from chemicals. Protective eyewear must always be worn when you are working with any type of chemical, to prevent any chemical coming into contact with your eyes. ...read more.


Active transport differs, in that diffusion, because diffusion (and osmosis) are passive, whereas active transport only occurs in cells that contain adenosine triphosphate (ATP), which is why it is called 'active transport'. The energy that is in the form of ATP is generated by the mitochondria. Active transport occurs in many places in the body, e.g. to transport glucose quickly across the lining of the digestive system, it is also a carrier of protein. Evaluation I think that my experiment went extremely well. The hardest part about the experiment was measuring the amounts for the solutions, because I needed to get it as accurate as possible each time. This therefore means the results I received would be more exact, and make my experiment as accurate as possible. Except for accuracy, I don't think I had any other difficulties during the experiment. If I were to extend my experiment I would have 14 test tubes this time instead of 7, therefore having two lots of results for each strength solution. The direct result of this would mean that I would decrease the risk of error because I could combine my results and make an average, for each one, and increase the accuracy. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Molecules & 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 AS and A Level Molecules & Cells essays

  1. Marked by a teacher

    Beetroot Practical Write up

    3 star(s)

    final results individually with each test tube or boiling tube substance * Record results by noting the percentage reading of the light transmittance Preliminary Prediction: By exposing a membrane to a solvent, ethanol, it will affect its permeability. The higher the concentration of the solvent, the more permeable the membrane will be.

  2. An experiment to find of the isotonic point of root vegetables cells in contents ...

    6. Using the information in the table add the correct amount of the 1 molar sucrose solution and water to the appropriate beaker. Repeat this process for each concentration until the required concentrations are made. Method for actual experiment 1. Using a core Borer sized 4 you cut out five cylinders

  1. TB Assignment

    If this does happen, then more tests will have to be done. An X ray of the chest is done to look for signs of active disease followed by a series of other checks. If the bacteria are found it might be tested further to see if it is resistant to any of the drugs commonly used to treat tuberculosis.

  2. Investigating Osmosis.

    through the cell membrane. Passive transport does not require such an energy expenditure, and occurs spontaneously. The principle means of passive transport is diffusion. Diffusion is the movement of molecules from a region in which they are highly concentrated to a region in which they are less concentrated.

  1. Catalyse Investigation

    of the enzyme, Catalase, were considered and controlled so that they would not disrupt the success of the experiment. i) Temperature - As temperature increases, molecules move faster (kinetic theory). In an enzyme catalysed reaction, such as the decomposition of hydrogen peroxide, this increases the rate at which the enzyme

  2. Cell reasearch assignment

    This is backed up by the following observations: * Organelles contain circular DNA. * They contain 70S ribosomes. * Organelles have a bilayer membrane, as if a single-membrane had been engulfed and surrounded by another. * Organelles reproduce by binary fission.

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