The pH of the blood does not appreaciably change by small addition of an acid or a base because blood

Options

A. contains serum protein which acts as a buffer
B. contains iron as a part of the molecule
C. can be easily coagulated
D. is a body fluid

Answer

A

Explanation

The pH of the blood does not appreciably change by small addition of acid or a base because blood contains serum proteins which acts as a buffer.