Certified Histocompatibility Specialist Practice Test

To determine the cell concentration in solution three, when combining solutions one and two, it is necessary to perform a calculation that considers the initial concentrations of both solutions along with their respective volumes. The overall concentration in the final solution can be calculated using the formula for mixing two solutions, which involves summing the total number of cells from both solutions and dividing that sum by the total volume of the resulting mixture. If solution one, for example, has a concentration of a certain number of cells per milliliter and solution two has a different concentration, when they are combined, the total number of cells will be the sum of the cells in both solutions. The final volume will also be the total volume of both solutions combined. After performing these calculations accurately, if the result corresponds to 3.4 x 10^6 cells/ml, this confirms that the concentration of cells in solution three is based on correct arithmetic that reflects the distribution and concentration of cells from both incorporated solutions. Therefore, choosing this concentration indicates that the calculation of combined cell numbers and the total resultant volume was executed correctly, leading to the valid conclusion about the concentration of the third solution.