Question

multiple choice question
which proteins found in blood are involved in the nonspecific defense against pathogens?

○ collagen

○ albumin

○ complement

○ fibrin

Explanation:

• Collagen is a structural protein in connective tissues, not involved in blood - based nonspecific defense.
• Albumin is mainly for maintaining osmotic pressure and transporting substances, not for defense.
• Complement proteins are part of the innate (nonspecific) immune system in blood, helping to destroy pathogens.
• Fibrin is involved in blood clotting, not defense against pathogens.

Answer:

C. Complement