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Micro Ch.9 P & KC

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Question
Answer
show Bacterial endospores  
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33. The process that destroys or removes all microorganisms and microbial forms including bacterial endospores on inanimate objects is ______. disinfection sterilization antisepsis sanitization degermation   show
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show sanitization  
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show disinfection  
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The use of chemical agents directly on exposed body surfaces to destroy or inhibit vegetative pathogens is ______. disinfection sterilization antisepsis sanitization ionization   show
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2. Scrubbing or immersing the skin in chemicals to reduce the numbers of microbes on the skin is _______. disinfection sterilization antisepsis sanitization ionization   show
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Which of the following types of control agents would be used to achieve sterility? Virucide Bactericide Germicide Sporicide Fungicide   show
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show vegetative bacteria and fungi  
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show disinfection  
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show antisepsis  
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38. The removal of all life forms from inanimate objects is termed _______. antisepsis disinfection sterilization decontamination degerming   show
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4. The betadine swab before blood donation is an example of _______. antisepsis disinfection sterilization decontamination sanitation   show
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show antisepsis  
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A cleansing method that mechanically removes microbes and other debris to reduce contamination is _______. disinfection sterilization. antisepsis sanitization degermation   show
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Which is correct regarding the rate of microbial death? Cells die at increasingly greater rates. Only older cells die in a culture. Cells in a culture die at a constant rate. Upon contact with the control agent, all cells die at one time. Cells become metabolically inactive, but are never killed.   show
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show All of these will influence the action  
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39. Microbial death occurs when there is ________. no movement permanent loss of reproduction a change in appearance a decrease in size All of these occur   show
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show cytoplasm  
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show denature  
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10. Agents that can denature microbial proteins include all of the following except _______. moist heat alcohol acids metallic ions X rays   show
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show Moist heat  
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43. Physical agents for controlling microbial growth include all the following except _______. ultraviolet radiation boiling water HEPA filters pasteurization hydrogen peroxide   show
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show steam autoclave  
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42. Dry heat ________. is less efficient than moist heat cannot sterilize includes tyndallization is used in devices called autoclaves will sterilize at 121°C for 15 minutes   show
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show 121°C at 15 psi for 15 minutes  
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40. The shortest time required to kill all the microbes in a sample at a specified temperature is called the ________. thermal death point (TDP) thermal death time (TDT) sporicidal time death phase point None of the choices are correct   show
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41. The lowest temperature needed to kill all microbes in 10 minutes is the ________. thermal death point (TDP) thermal death time (TDT) sporicidal time death phase point None of the choices are correct   show
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show pasteurization  
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show bacteriostatic  
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Pasteurization ________. kills all vegetative forms reduces the number of vegetative forms reduces the number of endospores increases food nutrient value None of the choices are correct   show
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45. ______ heat is more rapidly effective and efficient compared to _______ heat. High; dry High; moist Dry; moist Moist; dry Moist; high   show
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show Autoclave  
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Vials of microorganisms that undergo the freeze-drying process called _______ will remain preserved and viable for years. desiccation flash freeze lyophilization pasteurization sterilization   show
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Removal of moisture by dehydration is called _______. desiccation flash freeze lyophilization pasteurization sterilization   show
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_______ radiation excites atoms to a higher energy state within molecules such as DNA that then leads to the formation of pyrimidine dimers. Infrared Ultraviolet Gamma Particle Ionizing   show
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12. Which of the following items are typically irradiated in order to kill microbes? Meats like ground beef and pork Human tissues such as heart valves and skin Operating room air Surgical gloves All of the choices are correct.   show
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Which control method would not be a suitable choice for killing Mycobacterium in a capped culture tube? Ultraviolet (germicidal) light Gamma rays 121°C at 15 psi for 15 minutes 160°C for 2 hours All of the choices would kill Mycobacterium in a culture tube.   show
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Which of the following forms of radiation is in order from the most penetrating to the least penetrating? Gamma, cathode, X rays Gamma, X rays, cathode Cathode, gamma, X ray Cathode, X ray, gamma X ray, gamma, cathode   show
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show air  
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show Filtration  
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show All of these choices are factors  
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show Chlorine  
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16. The compound that is an organic base containing chlorine and two phenolic rings, and is used increasingly for mucous membrane irrigation, obstetrical washes, hand scrubbing, and prepping surgical skin sites is ______. carbolic acid chlorhexidine triclosan. formalin quarternary ammonium compounds   show
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show All of the choices are correct  
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show hydrogen peroxide  
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show All of the choices are correct  
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show iodine  
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8. Heavy metals work by ________. rupturing the cell membrane inactivating proteins binding to DNA dissolving the cell wall mutating DNA   show
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show Glutaraldehyde  
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show sporicidal  
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show Moist heat: Steam/boiling water, shorter time to sterility. Methods include boiling, pasteurization, and autoclaving. Dry heat: Hot air, needs higher temperature and longer time. Methods include incineration and hot air ovens.  
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9. Surfactants work by ________.   show
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show release hypochlorous acid in solution cause denaturation of enzymes used to disinfect water, restaurant, and medical equipment  
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18. How does Antimicrobial agents can target the cell walls   show
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show Creating a hypertonic environment, such as salting or sugaring, which draws water out of microbial cells, causing plasmolysis.  
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show Autoclaving and incineration  
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21. Temperature and time must be considered when determining susceptibility of microbes to lethal conditions. At a specific temperature, the thermal death _____ can be determined, alternatively, the thermal death _____ can be assessed as the lowest temperature that will kill a test organism   show
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show Increased microbial resistance to these chemicals  
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show Disrupting cell membranes and denaturing proteins  
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25. All of the following are disadvantages to using compounds containing heavy metals, except ________.   show
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26. The use of aldehydes as antimicrobial agents is limited due to ________.   show
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show increased cost  
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show it can be used to sterilize plastics that would melt in an autoclave  
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29. A(n) _________ would be used to destroy bacteria on a countertop whereas a(n) _________ would be used on skin prior to making an incision.   show
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30. Choose the microbial control method that neither inhibits nor kills microbes, but instead physically removes them from liquids or air.   show
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show Targets cell membrane components and denatures proteins  
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22. Discuss the characteristic of dry heat   show
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Micro Chapter 9 Study Material Jamie Garrison   show
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