1. it's assumed that the amino acids are the first candidate to protect body fluid against any pH change, are you agree or disagree relying on your titration curve ?

\begin{tabular}{|c|c|} \hline NaOHTotalVolume & pH \\ \hline 0 (initial pH) & 1.88 \\ \hline 0.4mL & 1.81 \\ \hline 0.8mL & 1.86 \\ \hline 1.2 & 1.92 \\ \hline 1.6 & 1.98 \\ \hline 2 & 2.05 \\ \hline 2.4 & 2.13 \\ \hline 2.8 & 2.21 \\ \hline 3.2 & 2.29 \\ \hline 3.6 & 2.39 \\ \hline 4 & 2.49 \\ \hline 4.4 & 2.61 \\ \hline 4.8 & 2.75 \\ \hline 5.2 & 2.93 \\ \hline 5.6 & 3.19 \\ \hline 6 & 3.46 \\ \hline 6.4 & 6.97 \\ \hline \end{tabular} \begin{tabular}{|c|c|} \hline NaOHTotalVolume & pH \\ \hline 6.8 & 8.71 \\ \hline 7.2 & 9.06 \\ \hline 7.6 & 9.28 \\ \hline 8 & 9.45 \\ \hline 8.4 & 9.59 \\ \hline 8.8 & 9.73 \\ \hline 9.2 & 9.86 \\ \hline 9.6 & 9.99 \\ \hline 10 & 10.14 \\ \hline 10.4 & 10.31 \\ \hline 10.8 & 10.51 \\ \hline 11.2 & 10.76 \\ \hline 11.6 & 11.04 \\ \hline 12 & 11.28 \\ \hline 12.4 & 11.45 \\ \hline 12.8 & 11.57 \\ \hline 13.2 & 11.67 \\ \hline 13.6 & 11.75 \\ \hline \end{tabular}