Answer Happy

Which of the following statements are true regarding the pathophysiology of infectious diseases? 1. Opportunistic pathogens in the microbiome can cause disease 2. Influenza viruses establish lifelong latency in lymph nodes of the lung 3. Viruses cause cell injury after directly entering a host cell 4. MHC class I recognizes extracellular antigens, while MHC class II recognizes intracellular antigens 5. All pathogens can target any organ system once they have entered into the circulation
Which of the following are true about the glial cells of the CNS? 1. Astrocytes are phagocytes that can remove bacteria and cellular debris from the CNS 2. Oligodendrocytes assemble multiple layers of myelin sheaths 3. Microglia connect neurons to blood vessels and form scar tissue in response to CNS trauma 4. Astrocytes can synthesize and release certain neurotransmitters 5. In multiple sclerosis, an abnormal immune response in the CNS targets and destroys microglia