Match the different responses of the body to an antigen attack to their appropriate systems. innate immune system integumentary system lymphatic system adaptive immune system phagocytosis of antigens by macrophages arrowRight production of antibodies against the antigen arrowRight drainage of fluid containing antigens by capillaries arrowRight protective barrier covering internal organs arrowRight

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.