The processes of clonal selection and clonal expansion occur during _____. a. adaptive immune responses b. innate immune responses c. hematopoiesis d. self renewal e. immunodeficiency diseases.

Interferon alpha and beta are released by virally infected cells to warn nearby cells about the virus and try to prevent spread. This is an example of  _____ signalling. A. Autocrine B. Endocrine C. Paracrine D. Exocrine

Breastfed infants typically are resistant to disease because of ________. a. active immunity b. passive immunity c. immune tolerance d. immune memory

7. _ (blank) _ produce antibodies that are released into the bloodstream. Select one: a. B cells b. T cells c. Plasma cells d. Memory cells e. Mast cells   8. What is produced by white blood cells and act to stimulate other white blood cells? Select one: a. Immunoglobulins b. Histamines c. Interferons d. Interleukins e. Complements   9. An important step in the body's second line of defense is to identify the pathogen's _ (blank) _. Select one: a. Antibodies b. Histamines c. Antigens d. Cytokines e. Interferons