ATI TEAS 7 Science Pretest (A+ Guaranteed)

Inflammation, production of interferon, and ingestion of pathogens by phagocytes are nonspecific cellular responses by which of the following? A.) The internal aspect of adaptive immune system B.) Antibody-mediated immunity C.) The internal aspect of the innate immune system D.) Passive immunity correct answers C.) The internal aspect of the innate immune system If the external barrier is breached, the second line of defense is the internal aspect of the innate immune system, a collection of nonspecific cellular responses (inflammation, production of interferon, ingestion of pathogens by phagocytes). What feature of the adaptive immune system decreases the amount of time it takes for the body to respond to a particular antigen? A.) Unbroken skin B.) Memory Cells C.) Cytotoxic T-cells D.) Inflammation correct answers B.) Memory cells Memory cells are a type of lymphocyte that responds more quickly to an antigen upon reintroduction of the pathogen. Which of the following occurs in the cardiac cycle if the impulse triggered a at the sinoatrial mode never reaches the Purkinje fibers of the heart? A.) The atria will not contract. B.) There will be an absence of systole. C.) The ventricles will not contract. D.) Diastole will shorten in duration. correct answers C.) The ventricles will not contract. The Purkinje fiber impulse causes the contraction of the ventricles.