Question

the ph scale is a measure of acidity and runs from 0 (most acidic) to 14 (most basic). acidic ←————— neutral ——————→ alkaline 1 2 3 4 5 6 7 8 9 10 11 12 13 14 the ph of our blood is strictly maintained between 7.3 and 7.5 by a _____. a) acid b) base c) proton d) buffer e) salt

Explanation:

Buffers resist changes in pH. In the human body, buffers work to keep the blood's pH within the narrow range of 7.3 - 7.5, preventing it from becoming too acidic or too basic. Acids lower pH, bases raise pH, protons are hydrogen - ions related to pH but don't maintain it, and salts alone don't regulate pH in this context.

Answer:

d) Buffer