A crime scene investigator found that a biological fluid sample contains a large amount of IgA-type antibody. This fluid is probably
A) blood.
B) lymph.
C) serum.
D) tears.
E) interstitial.

Question

Quizplus · Accepted Answer

Tears are the most likely fluid sample to contain a large amount of IgA-type antibody, as they are known to contain high levels of this antibody type. Blood, lymph, and serum may contain IgA antibodies but typically not in large amounts. Interstitial fluid is a type of fluid found between cells, and there is no reason to suspect it would contain a large amount of IgA antibodies.

A Crime Scene Investigator Found That a Biological Fluid Sample