MRCP UK EXAMINATIONS

Detailed explanation-1: -The immune system refers to a collection of cells, chemicals and processes that function to protect the skin, respiratory passages, intestinal tract and other areas from foreign antigens, such as microbes (organisms such as bacteria, fungi, and parasites), viruses, cancer cells, and toxins.

Detailed explanation-2: -Antibodies act against viruses primarily by binding to and neutralizing virions and by directing the lysis of infected cells by complement or killer leukocytes.

Detailed explanation-3: -The innate immune system is the body’s first line of defense against germs entering the body.

Detailed explanation-4: -Antibody. The specific immune response to parasites leads to the production of antibody. Infection by protozoan parasites is associated with the production of IgG and IgM.