1. Why are immune responses that occur upon a second exposure…

  

1. Why are immune responses that occur upon a second exposure… 1. Why are immune responses that occur upon a second exposure usually better at clearing a pathogen than primary responses? Give four specific reasons, each with a brief explanation. 2. Early immunologists divided immunity into “humoral” and “cellular” mechanisms whereby humoral referred to the antimicrobial activities of serum and cellular referred to the actions of cells that directly countered infection. With your modern, more holistic understanding of the immune system, identify and explain three different ways specific antibody types collaborate with immune cells to fight infection.   Science Biology BIOL 310 Share (0)