PCB4233 Exam 1 Questions & Answers Rated A+ New Update Assured Satisfaction

Epithelial surfaces provide the first line of defense against infection by the use of several types of mechanisms. One of the chemical mechanisms used by epithelia is: Secretion of antimicrobial peptides by epithelial cells 3 multiple choice options Neutrophil defensins are _________. short peptides Which of the following statements is TRUE of lysozyme? Lysozyme splits peptidoglycan 3 multiple choice options T/F: The classical and lectin pathways of complement activation converge at the step of C3 activation. However, the initiating steps of each pathway use protein components and enzymatic mechanisms that share NO similarity with each other. False T/F: The C3 convertase amplifies the process of complement activation by generating large amounts of C3b and cleaving large numbers of C5 molecules False Complement component C3 is cleaved by _____________. C3bBb The membrane attack complex consists of ______________. C5b,6,7,8,9An infant with recurrent bacterial and fungal infections is suspected to have an immunodeficiency disease. Within two days after exposure to a pathogen, the organisms have proliferated to dangerous levels requiring immediate systemic antibiotic treatment. It is unlikely that this infant has a defect in B or T lymphocyte responses to the infection because: The defective immune response occurs too rapidly following infection to be due to a defect in B or T lymphocytes responses. 3 multiple choice options