Biological problem

watch the video  https://www.youtube.com/watch?v=OZG8M_ldA1M , and answer following questions.

1.Briefly describe how diffusion, in its various forms, is involved in your nervous system.

2.“Nature hates gradients! It wants to even out all inequalities in concentration and charge.” This is known as homeostasis. Your body will not allow its balances to be unbalanced. The NaCl concentration in your blood is 0.85%, as you learned in your osmosis lab. The pH of your blood is 7.4. Based on this information, why is it unlikely drinking alkaline water (pH 8-9) will alter the pH of your blood?