Question

An immune response is initiated by the presence of which molecules

Answer 1

Answer:

primary immune response is by Ig M , secondary immune response is by Ig G

Answer 2

Answer:

$Antigens are anything that causes an immune response. Antigens can be entire pathogens, like bacteria, viruses, fungi, and parasites, or smallerproteins that pathogens express. Antigens are like a name tag for each pathogen that announce the pathogens' presence to your immune system.$