a dairy cow has just finished consuming some herbage (which is... | Filo (2024)

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Which of the following alternatives is INCORRECT in reference to the respiratory barrier? Choose one option: A. can be seen by electron microscopy B. has an internal coating of the so-called surfactant agent C. contains the endothelial layer of capillaries that supply the respiratory portion of the respiratory system D. Its function is governed by establishing the physical separation between alveolar walls adjacent E. is associated with the Type I pneumocyte.

Texts: 6. The four major parts of a virion are nucleic acid, capsid, receptors (may be on surface or on spikes/tail fibers), and envelope. Viruses may also have a fifth part - accessory proteins. What is the purpose of each of the four listed major parts? Which of the four major parts are present in all virions and which are found on only some virions?8. Explain why most viruses only infect a particular host organism and may only be able to infect specific cells in the host. What kingdoms of cells can be infected by viruses (do not list specific cells/viruses)? What is meant by the term bacteriophage (aka phage)? Describe the term "host range."15. List the FIVE stages of lytic replication that occur in ALL viruses (animal and bacterial). All steps are required for the virus to reproduce, but each step has a particular purpose in the overall process. Each step must occur before the next step can take place. For each step, describe generally what happens in that step. Be sure you are describing a GENERAL process and NOT any one specific type of virus. If you mention 'tail fibers', then you are answering this wrong. For each step, explain why that particular process must occur for the process of viral replication to be completed. For example, the second step must happen as the virus can only replicate inside a host cell.16. A lytic virus completes all five steps of the lytic cycle. A lysogenic virus only completes the first two steps of the lytic cycle and then the rest of the replication process is suppressed (at least temporarily) by the cell. What are two other ways in which lytic and lysogenic viruses are different? Think about the number of virions made, whether the cell is killed by the virus, etc. Define latency, prophage, lysogenic conversion, and induction. Identify diseases caused by prions. Identify how prions are destroyed.

When the hospital helicopter arrived with a patient, the emergency medical technician, George, gave the nurse, Cheikh, a detailed verbal report that lasted about an hour. He used complex medical terms to explain the patient's condition and verified that Cheikh understood all the information before he left. How might George have improved this verbal report?