D - Allow pH to change drastically.
The reason that we have buffer in our system is to protect AGAINST sudden change of pH
A and B. Because if heart cells were located in your brain, your brain would not perform the right function. And B because if cells perform different functions and are in the wrong spot im your body it wouldnt work.
Answer:
Passive Transport
Explanation:
The movement of molecules from an area of High concentration to an area of lower concentration in a living cell is called Passive Transport.
Passive Transport does not require energy input.
An example is Diffusion.
The relevant questions are number 2, 3, and 4.