Complement proteins are crucial for stimulating phagocytes to clear immune complexes. Predict what type of hypersensitivity disorder might result from complement deficiencies. Explain what other consequences might arise from a complement deficiency.

Video transcript

Hi everyone. Let's take a look at this practice problem together. Complement proteins are a group of proteins that form part of the immune system and play a crucial role in the body's defense against infections. Their actions complement the work done by the answer. Options are A T cells. Option BB cells, C antibodies and D erythrocytes. So recall that complement proteins form the complement system. When the complement system is activated, the complement proteins produce chain reactions and that leads to pathogen cell lysis phagocytosis of the pathogen and further inflammation. So let's go through and review the function of each of the answer. Options. Option A the T cells recall are important for attacking and destroying pathogens. Option B the B cells recall that these cells can differentiate into plasma cells to make and secrete antibodies. Option C the antibodies, antibodies are part of the immune system that produce a chain reaction in the system and ultimately leads to pathogen destruction. And then we have option D erythrocytes recall that erythrocytes are not cells of the immune system. Their function is to transport carbon dioxide and oxygen. So immediately we can get rid of. Option D now options A and B are cells of the immune system but they are not what complement proteins work in conjunction with. So both A and B are incorrect. The correct answer is antibodies, antibodies and complement proteins both produce chain reactions and that leads to pathogen killing. So, complement proteins complement work done by antibodies. The correct answer is option C antibodies. All right, everyone. I hope you found that helpful and I'll see you soon for the next practice problem.