hich of the following is a set of immediate general defenses against infection present in all multicelled organisms?   Innate immunity   Antibody-mediated immunity   Cell-mediated immunity   Adaptive immunity

Which of the following is true about the immune system? Check all that apoply. Rejecting  organs or bone marrow transplantation is the normal function of the immune system Overreaction of the immune system to cause allergy or causing autoimmune diseases is normal function of the immune system Immune system discriminates between self and non-self Immune system eliminates infectious agents but not cancer from the human body Eliminating infectious agents and cancer are the normal functions of the immune system

The development of primary and secondary immune responses to an antigen differs significantly. The primary response may take a week or more to develop fully and establish memory. The secondary response is rapid and relies on the activation of clones of memory cells. Would it not be better if clones of reactive cells were maintained regardless of prior exposure? In this way, the body could always respond rapidly to any antigen exposure. Would there be any disadvantages to this approach? Why?

Which if the following statements regarding the differentiation of self vs. non-self by the immune system is CORRECT?   - Failure to differentiate self vs. non-self can lead to autoimmune disease   - Differentiation of self vs. non-self is key to recognizing the presence of an infection   - Differentiation of self vs. non-self is key to mounting an immune response against infections and not against host tissues   - All of the above statements are correct