B. Inflammation occurs when red blood cells release chemicals into the blood.
Inflammation is the body’s normal response to fight injuries and infections. Immune cells, clotting proteins and signaling molecules are released when a pathogens and irritants. The cardinal signs of acute inflammation are pain, redness, immobility, swelling and heat of damaged area.
Antigens are any molecules that elicit adaptive immune response. Antigens protrude from pathogens or other intruding substances. Antibodies are proteins found in blood plasma that attach to one particular kind of antigen and help to counter its effects.
