Which of the intracellular buffers contributes the most to the cell's buffering capacity?
A) muscle bicarbonate
B) intracellular phosphate groups
C) intracellular proteins
D) all of the above contribute equally

Question

Quizplus · Accepted Answer

Intracellular proteins, including hemoglobin, actin, and myosin, contribute significantly more than bicarbonate or phosphate groups to the cell's buffering capacity. This is because proteins have many ionizable groups (such as amino and carboxyl groups) that can accept or donate protons, making them efficient buffers.

Which of the Intracellular Buffers Contributes the Most to the Cell's