Which of the following plasma proteins is responsible for inhibiting the activation of the complement system and preventing damage to host cells?

A C1-inhibitor ✓
B Factor H
C Factor I
D Properdin

Explanation

C1-inhibitor is a plasma protein that regulates the complement system by inhibiting the activation of C1, which helps prevent damage to host cells.

Source

Janeway's Immunobiology
Hematology Hematology: Blood Components Hematology: Blood Components Hard MEDICAL Confidence: medium