Maximum Cellular Size Composition

Maximum Cell Size & Durchmischung – Ferris Shaw

Study Question:

How exactly does the surface region to amount ratio affect the diffusion rate in agar cubes?


The rate of diffusion in directly linked to the surface area to volume ratio of cells and is also responsible for the efficiency of absorbing nutrients, oxygen, minerals etc . in the cell. This ratio is specific to cells as they require a rate that isn't just right to take very long to receive the nutrients and oxygen or perhaps too up-and-coming small to impair konzentrationsausgleich, known as the optimum sustainable cell size. Due to this it would be expected that the smaller the agar agar cube the bigger the rate of diffusion as a result of increased area to quantity ratio since it increases.


Independent Parameters:

* The size of the agar agar cubes sides, measured which has a calliper (cm) Dependent Changing:

* The diffusion price of sodium hydroxide (cm/min)


* The concentration of sodium hydroxide (0. 4%), same Bist du OH used throughout. * Temperature (°C), experiment happens in the same classroom * Time submerged in Mhh OH (8 min), using the timer

* Number of agar agar cubes in each beaker, excess of Bist du OH to be used * Attention of agar agar cubes (%), same agar agar cubes applied throughout the test Uncontrollable:

2. Volume of salt hydroxide in each beaker (cm3)

5. Humidity (Pa)


5. NaOH option (0. 4%) concentrate

* Beaker

* Timer ± 0. 5s

* Agar agar containing phenolphthalein

* Calliper ±0. 001 cm

* Cutting knife

* Mat

* Spoon

* Stirrer


2. Using the blade, cut the agar into 5 de with specific measured extent, widths and heights making use of the calliper. * Fill a beaker with enough Mhh OH to hide all your five agar cubes to be located, place the agar agar cubes inside the beaker and immediately commence the timer. * Keep for 8 mins, stirring every two mins to insure every area of the cube are covered. * Vacant out the cubes from the beaker and right away...