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I need three limitations, and ways to overcome them, the one I already have is the the strip size may vary, and you could use a set size cork borer to ensure they're the same size.Could someone help me as to what the other two are?Passive transport takes place in the cells by the process of diffusion or osmosis.
But what if the cell wants to bring in a molecule which is already present in high concentration inside the cell ? So now we can describe active transport as the process in which substance are absorbed against the concentration gradient (or we can say substance move from a region of lower concentration to a region of higher concentration) with the help of an enzyme. Active transport takes place both in animal cells and plant cells.
In animal cells, it takes place in the small intestine while absorbing food.
I recently did the osmosis potato experiment, where you cut strips of potato and leave them in different concentrations of sucrose solution overnight.
Then you work out the change in mass, and the percentage change in mass.
Cyanide is a poison which is called the respiratory inhibitor as it doesn’t let mitochondria perform the aerobic respiration.
This in turn badly affects the energy availability in the cells which causes the active transport to either slow down or stop.Glucose molecules are produced in lumens when food is digested.Now that the concentration of glucose molecules in the lumen is much lower than that in the cells, they are transported inside the cells by active transport against the concentration gradient.Some strips might have 'skins.' These would act as a barrier to reduce the rate of osmosis. Inconsistent blotting might lead to some strips being left with more excess water than others. potato skin could be left on affecting the results when blotting the chips after osmosis, theres a risk of forcing water out of the cells, affecting the change in mass I forgot the rest lol, need to look over my notes.In order to overcome this you could blot them gently and consistently in circular motions. potato skin could be left on affecting the results when blotting the chips after osmosis, theres a risk of forcing water out of the cells, affecting the change in mass I forgot the rest lol, need to look over my notes.Further those molecules can be transported to blood stream with Root hair cells found in the roots of the plant transports ions such as magnesium (Mg) from the soil into the cells as these ions are needed to make chlorophyll in the leaves.The concentration of Mg ions is lower in the soil than in the root cells so active transport is used to transport the ions into the cells.Any opinions, findings, conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of UK Essays.The term homeostasis was first coined by Walter Cannon in 1929 to literally mean ‘steady state’.Find me at: Will created Ask Will back in 2010 to help students revise and bloggers make money developing himself into an expert in PPC, blogging, and online marketing.He now runs others websites such as Poem and Restoring .