Investigating the osmotic consequence of different solutions on ruddy blood cells


In this lab we wanted to understand the osmotic consequence that changing solute concentration has on red blood cells. Osmosis is the manner H2O molecules pass a selectively permeable membrane down a concentration gradient. Osmosis was demonstrated when six different solutions of glucose, Na chloride and distilled H2O were assorted with ruddy blood cells and the lucidity of the solution against printed text was recorded and viewed under the light microscope, entering any alterations to the cells observed and anticipating a alteration in blood cells with changing solute concentrations. The consequences obtained indicate that H2O molecules so move from high concentrated solutions to a low concentrated one and instability in H2O in solution can take to cell bursting or shrinkage.

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The intent of the lab was to prove the consequence that alteration in solute concentration of the environment have on ruddy blood cells, The hypothesis tested was that osmosis should happen based on the solute concentration on the exterior of the ruddy blood cells. The membrane of blood cells are permeable to H2O molecules hence there is a changeless motion of H2O molecules across the membrane of the blood cell in a procedure of Osmosis, Osmosis is the net motion of H2O molecules from a part of high H2O potency to a part of low H2O potency ( Bradley and Calvert, 2006 ) , the motion of H2O around assorted parts of the organic structure is governed by an importance force known as the osmotic force per unit area ( Joshi, 2009 ) .

Osmosis is critical for populating beings, act uponing the distribution of foods with the release of metabolic waste merchandises such as urea. Blood is the connective tissue which carries the foods in its inanimate matrix called the plasma ( Marieb, 2012 ) if blood cells were to be surrounded in an isosmotic solution, they will neither shrivel nor swell which is ideal. However, if the solution is hypertonic, the cells will lose H2O and psychiatrist ; our body’s physiology will seek to keep a balanced environment so that blood cells remain unaffected.

Areal life illustration of osmosis occurring is during the filtration procedure, which takes topographic point in the kidneys. Over 80 % of the filtrate is reabsorbed into the tissue fluid and thenintothe blood which ensures that bulk of the utile stuffs such as glucose and amino acids that were filtered out of the blood get returned back to the blood. Patients with kidney failure are unable to take such waste merchandises nevertheless hemodialysis Acts of the Apostless as an “artificial kidney” ( Schrier, 2007 ) which circulates the patient’s blood through a membrane tubing immersed in a solution in order to acquire rid of the waste merchandises in the blood ( Marieb,2012 Page 520 ) giving a individual with a chronic unwellness such a utile intervention.


A tabular array is drawn out to enter the consequences. Six trial tubings separately labelled A-F were prepared. 2ml of the undermentioned solutions were measured utilizing Pasteur pipettes -0.9 % Na chloride, 10 % Na chloride, distilled H2O, 20 % glucose, 5 % glucose and 0.5 % glucose. An speckless Pasteur pipette was used to add 2 beads of Equus caballus blood into trial tubing labelled A, the tubing is inverted in order to blend the content. Test tubing is held in forepart of some text and the lucidity of print seen through the trial tubing is recorded.

The same process is repeated on staying trial tubings and the lucidity was besides recorded. Small sample from trial tubing A is obtained and one bead is placed on a microscope slide, a screen faux pas is placed on top and the slide is viewed under a light microscope at x400 magnification, the form of the cell and the consequence of the solution is observed and recorded, This is repeated for the other trial tubing samples.


Table 1 are the consequences for each trial tubing which contained different solutions with 2ml of Equus caballus blood assorted, the concentration of the solution in the trial tubing were determined by the lucidity of the print and besides depict the slides when viewed under the microscope.


Trial Tube Clarity of print Cell under the microscope ( x400 magnification ) Hypertonic, Hypotonic or Isotonic
A 0.9 % Sodium chloride solution Not Clear No alteration to cells Isotonic
B 10 % Sodium chloride solution Not Clear The cell shrunk in size

Addition of distilled H2O decreased the figure of cells present.

C Distilled H2O Clear The cells got bigger in size and figure of cell under microscope decreased after a piece Hypotonic
D 20 % Glucose solution Not clear The cell shrunk in size Hypertonic
E 5 % Glucose Solution Not clear No alteration to cell form or figure Isotonic
F 0.5 % Glucose solution Clear The cells shrunk in size and an addition in environing traveling cells Hypertonic

Consequences obtained from the experiment clearly demo how osmotic force per unit area can do a difference to the cells based in the solution that it is in back uping my hypothesis. The blood cells in the 10 % NaCl solution were crenated ; we know this because all the cells viewed were well smaller. The cells in the 0.9 % NaCl were viewed as normal with few or no alterations.

The cells in the distilled H2O were either enlarged, or haemolysed. We know this because the cells in the viewing field were much bigger, but there were really few of them because many had burst. The cells placed in hypotonic solution lead the solution to go clear ruddy and the print to go seeable where as the cells placed in hypertonic and isosmotic solution was really nebulose and the print was non seeable.

The human kidney is a complex organ chiefly responsible for osmoregulation of fluids and electrolyte whilst besides egesting waste merchandises from the blood through the production of piss ( Bradley and Calvert, 2006 ) The kidneys besides perform other critical functions such as keeping the internal conditions known as homeostasis, modulating blood force per unit area and osmotic force per unit area ( Stellman, 1998 ) therefore the motion of H2O in and out of blood cells are of import in order to carry through these functions.

Cells placed in 5 % glucose and 0.9 NaCl besides known as saline are isosmotic which had no alteration to the cells because the solution has the same solute and H2O concentration as the plasma fluid therefore the motion of H2O is balanced due to the equal osmotic force per unit areas, interstitial fluid and most endovenous fluids are isosmotic to the cells so that the blood cells remain unchanged, the tabular array shows that cells infused in distilled H2O lead the blood cells to go larger as H2O keeps come ining the cell due to the solution being hypotonic to the cell with low solute concentration doing the cells to swell ( Clayden, 2001 ) , the figure of cells besides decreased as excessively much H2O come ining the blood cells caused the cells to split and let go of hemoglobin in a procedure called hemolysis ( Guyton and Hall, 2006 ) and the print becomes clear because the ruddy blood cells have haemolysed and therefore do non diffract visible radiation.

Cells placed in hypertonic solution such as the 20 % glucose causes the cells to shrivel in size since H2O moves from inside the cells to the exterior because the solution has greater inclination to draw H2O but the print was blurry as the cells were integral doing visible radiation to diffract ( Marieb, 2012 page 84 ) .

The methodological analysis used to see the lucidity of the print was subjective for each individual nevertheless utilizing a tintometer would hold been a better manner of finding whether the solution was clear or non, nevertheless utilizing the samples on the microscope was a really precise manner on mensurating the consequence as it was easier to detect the alterations in the cells however a haemocytometer could hold been used in order to mensurate the blood cell concentration quantitatively.

The organic structure requires minimal H2O consumption of 1 Litre and desiccation occurs when unstable loss becomes greater than sum consumed, during desiccation the loss of organic structure fluids causes a rise in blood solute concentration that increases in osmolality, In effort to recover unstable balance the degrees of Na rises by switching H2O molecules out of the cells and into the blood, normally reforming the instability but without sufficient H2O in the extracellular infinite, H2O continues to switch out of the cells and into the infinite, doing the cells to shrink as established in the hypertonic trial tubing which leads to a lessening in blood volume and besides impacting thermoregulation taking to other serious complications such as dangerous hypovolaemic daze ( Sembulingam and Sembulingam, n.d. )

In decision from the lab conducted it can be seen how osmosis can do a difference to cells based on the solution it is in, In an isosmotic solution the cells did non alter in size, in a hypertonic solution the cells experience shrinkage and in a hypotonic solution the cells haemolysed. The findings provide account as to what happens to blood cells in milieus of different osmotic force per unit areas and the motion of H2O molecules during osmoregulation and unnatural map of homeostasis controls may do conditions such as hydrops.



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