The pаrаsympаthetic divisiоn оf the autоnomic nervous system stimulates the body’s vegetative activities such as digestion, urination, and defecation.
Fоllоwing childbirth, ____ stimulаtes milk prоduction in the mаmmаry glands.
InstructiоnsReаd eаch questiоn cаrefully.Answer each questiоn by bubbling your answer on the Scantron answer sheet.After you have finished answering all questions, select TRUE.Click Finish Attempt at the bottom of the page.On the next page, click Submit All and Finish.If a confirmation message appears, click Submit All and Finish again to complete your submission.Once your assessment has been submitted successfully, notify your proctor that you are finished. Please wait for the proctor's instructions before proceeding to the next step.1. Which term refers to the complete destruction or elimination of all forms of microbial life, including bacterial endospores?A. DisinfectionB. AntisepsisC. DecontaminationD. Sterilization (correct)E. Sanitization2. Which process is specifically used on living tissue to reduce or eliminate microorganisms?A. SterilizationB. DisinfectionC. Antisepsis (correct)D. DecontaminationE. Pasteurization3. Which microbial structure is generally the most resistant to physical and chemical control methods?A. CapsuleB. Vegetative bacterial cellC. Enveloped virusD. Bacterial endospore (correct)E. Fungal hypha4. Which term describes making an object or area safe to handle by removing or reducing contamination?A. SterilizationB. PasteurizationC. AntisepsisD. Decontamination (correct)E. Incubation5. An antimicrobial treatment that kills microorganisms is described as:A. BacteriostaticB. BactericidalC. FungistaticD. StaticE. Selective6. An antimicrobial treatment that inhibits microbial growth without necessarily killing the microorganisms is:A. BactericidalB. VirucidalC. BacteriostaticD. SterilizingE. Lytic7. Which factor can affect the effectiveness of a chemical disinfectant?A. Only its colorB. Concentration and contact timeC. Only the container sizeD. Only the organism's shapeE. Only room lighting8. Which of the following is NOT a major cellular target of physical or chemical antimicrobial control?A. ProteinsB. Nucleic acidsC. Cell membranesD. Cell wallsE. Capsule color9. Which cellular structure is a major target of antimicrobial agents because it is absent from human cells?A. Human cell membraneB. Bacterial cell wallC. Human ribosomeD. Bacterial chromosome onlyE. Capsule pigment10. Which mechanism directly damages microbial cell membranes?A. DNA replicationB. Protein foldingC. Membrane disruptionD. Capsule formationE. Endospore germination11. Which effect occurs when heat causes microbial proteins to lose their functional structure?A. OsmosisB. DenaturationC. FiltrationD. ConjugationE. Mutation12. Which type of heat is generally more effective at killing microorganisms because water transfers heat efficiently?A. Dry heatB. Infrared radiationC. Moist heatD. UV radiationE. Desiccation13. In general, increasing temperature allows microbial killing to occur:A. More slowlyB. More rapidlyC. Only in the presence of oxygenD. Only in dry conditionsE. Without affecting proteins14. Thermal death time is the:A. Lowest temperature that kills all organismsB. Time required to kill all microorganisms at a specified temperatureC. Time required for spores to formD. Time needed for pasteurizationE. Temperature at which proteins denature15. Thermal death point is the:A. Time needed to kill microorganismsB. Lowest temperature at which all microorganisms in a sample are killed in a specified timeC. Temperature of bacterial growthD. Time needed for sterilizationE. Temperature at which spores germinate16. Why does boiling water not necessarily achieve sterilization?A. Water cannot reach high temperaturesB. Bacteria cannot be killed by heatC. Some bacterial endospores can survive boilingD. Boiling increases microbial growthE. Boiling only kills viruses17. Pasteurization is primarily intended to:A. Sterilize food completelyB. Destroy all endosporesC. Reduce microbial populations and pathogens while preserving product qualityD. Eliminate all microorganisms from surfacesE. Replace refrigeration18. Flash pasteurization commonly involves heating a product to approximately:A. 37°C for 24 hoursB. 50°C for 5 minutesC. 71.6°C for 15 secondsD. 100°C for 1 hourE. 121°C for 20 minutes19. Which condition is characteristic of standard autoclaving?A. 80°C at atmospheric pressureB. 100°C for 5 minutesC. 121°C at about 15 psi for about 20 minutesD. 160°C for 1 minuteE. 71.6°C for 15 seconds20. Which item would be most appropriately sterilized using an autoclave when compatible with heat and moisture?A. Skin tissueB. Heat-resistant surgical instrumentsC. Fresh fruitD. Human bloodE. Disposable plastic film21. Which type of radiation has sufficient energy to cause ionization and is useful for sterilizing some materials?A. Visible lightB. Ionizing radiationC. Infrared lightD. Microwave radiation onlyE. Radio waves22. UV radiation damages microbial DNA primarily by causing:A. Ribosome destructionB. Pyrimidine dimersC. Cell wall synthesisD. Protein phosphorylationE. Endospore formation23. A major limitation of ultraviolet radiation as a disinfectant is its:A. Excessive penetrationB. Poor penetrationC. Inability to damage DNAD. Requirement for high pressureE. Dependence on antibiotics24. Filtration controls microorganisms primarily by:A. Denaturing proteinsB. Destroying DNA chemicallyC. Physically retaining microorganismsD. Creating pyrimidine dimersE. Disrupting ribosomes25. High osmotic pressure can inhibit microbial growth by causing:A. DNA replicationB. PlasmolysisC. ConjugationD. TransductionE. Endospore germination26. The primary goal of antimicrobial chemotherapy is to:A. Destroy all microorganisms in the environmentB. Treat infection while minimizing harm to the patientC. Increase normal microbiotaD. Prevent all mutationsE. Sterilize the bloodstream27. Before beginning antimicrobial therapy, an important step is to:A. Always use the broadest-spectrum drugB. Obtain an appropriate specimen for organism identification and susceptibility testingC. Avoid collecting specimensD. Give multiple antibiotics immediatelyE. Wait until symptoms disappear28. An antimicrobial drug that acts against a limited range of microorganisms is considered:A. Broad-spectrumB. Narrow-spectrumC. NonspecificD. NonselectiveE. Sterilizing29. Which is an example of a broad-spectrum antibiotic?A. Penicillin G onlyB. Vancomycin onlyC. TetracyclineD. Bacitracin onlyE. Polymyxin only30. Why should a clinical specimen often be collected before antimicrobial therapy begins?A. Antibiotics improve specimen qualityB. Treatment may reduce or eliminate the organism, making identification more difficultC. Specimens cannot be collected after symptoms beginD. It prevents all resistanceE. It increases normal microbiota31. Which test is commonly used to assess bacterial susceptibility to antimicrobial agents using antibiotic disks?A. Gram stainB. Kirby–Bauer testC. ELISAD. PCRE. Endospore stain32. In the Kirby–Bauer test, a clear area around an antibiotic disk is called the:A. MICB. Zone of inhibitionC. Therapeutic windowD. Growth curveE. Inoculum zone33. The minimum inhibitory concentration (MIC) is the lowest concentration of an antimicrobial that:A. Kills every cell immediatelyB. Sterilizes a cultureC. Prevents visible microbial growthD. Causes mutationE. Produces maximum toxicity34. When comparing two drugs against the same organism, a lower MIC generally indicates:A. Lower antimicrobial activityB. Greater effectiveness at inhibiting growthC. Greater toxicity to humansD. Broader spectrum onlyE. Greater resistance35. The therapeutic index is used to describe:A. The organism's infectious doseB. The relative safety of an antimicrobial drugC. The size of a zone of inhibitionD. The number of normal microbiotaE. The incubation period36. Which drug has the widest margin of safety based on therapeutic index?A. TI = 2B. TI = 3C. TI = 5D. TI = 10E. TI = 137. The therapeutic window refers to:A. The time between infection and symptomsB. The range of drug concentrations that are effective without unacceptable toxicityC. The zone around an antibiotic diskD. The incubation periodE. The time before specimen collection38. Why is renal function important when administering some antimicrobial drugs?A. The kidneys can affect drug elimination and accumulationB. The kidneys produce all antibioticsC. Renal disease always prevents infectionD. Kidneys determine bacterial shapeE. Renal function affects Gram staining39. Selective toxicity means that an antimicrobial:A. Is toxic to all cells equallyB. Targets the microorganism more than the hostC. Only works against virusesD. Has no side effectsE. Cannot cause resistance40. Which target provides a particularly good basis for selective toxicity against bacteria?A. Human mitochondriaB. Bacterial cell wallC. Human cell membraneD. Human DNAE. Human ribosomes41. Beta-lactam antibiotics primarily interfere with:A. Viral attachmentB. Bacterial cell wall synthesisC. Fungal ergosterol synthesisD. Human DNA replicationE. Capsule pigmentation42. Which group includes antibiotics that inhibit bacterial cell wall synthesis?A. Beta-lactamsB. Antivirals onlyC. Antifungals onlyD. Antiprotozoals onlyE. Macrolides only43. Beta-lactamase contributes to antimicrobial resistance by:A. Increasing drug absorptionB. Inactivating beta-lactam antibioticsC. Strengthening bacterial capsules onlyD. Preventing mutationE. Increasing host immunity44. Which cellular structure is targeted by many antibiotics that inhibit bacterial protein synthesis?A. RibosomesB. EndosporesC. CapsulesD. LysosomesE. Human nuclei45. Superinfection can occur when antimicrobial therapy:A. Always increases normal microbiotaB. Disrupts normal microbiota and allows other organisms to overgrowC. Sterilizes the patientD. Prevents all opportunistic infectionsE. Eliminates antimicrobial resistance46. A major consequence of broad-spectrum antimicrobial therapy can be:A. Increased microbial diversity in all casesB. Disruption of normal microbiotaC. Permanent immunityD. Elimination of all virusesE. Prevention of secondary infections47. Which organism is classically associated with antibiotic-associated diarrhea after disruption of normal intestinal microbiota?A. LactobacillusB. Clostridioides difficileC. Mycoplasma pneumoniaeD. Treponema pallidumE. Mycobacterium tuberculosis48. Which adverse effect is particularly important to monitor with amphotericin B?A. Kidney dysfunctionB. Hearing improvementC. Increased bone densityD. HyperactivityE. Improved vision49. Which antiviral strategy directly prevents a virus from entering a host cell?A. Blocking viral entryB. Increasing bacterial cell wall synthesisC. Increasing fungal ergosterolD. Inhibiting host antibodiesE. Destroying bacterial endospores50. HIV protease inhibitors interfere primarily with:A. Bacterial cell wall synthesisB. Viral protein processing and maturationC. Fungal membrane formationD. Host DNA replicationE. Bacterial ribosome assembly51. Microorganisms that normally live on or in the human body are collectively called:A. PathogensB. ExotoxinsC. Resident microbiotaD. VirusesE. Endospores52. The term holobiont emphasizes that humans and their associated microorganisms:A. Are completely independentB. Function as an interacting biological systemC. Are always pathogenicD. Cannot exchange metabolitesE. Have identical genomes53. An infection occurs when:A. Microorganisms are always visibleB. Microorganisms enter and multiply in a host, potentially causing diseaseC. All normal microbiota are eliminatedD. A host is exposed to antibioticsE. A person has no symptoms54. Colonization refers to:A. Presence and multiplication of microorganisms without necessarily causing diseaseB. Destruction of all microorganismsC. Invasion of every tissueD. Production of endotoxin onlyE. Development of immunity55. Which body site normally contains abundant resident microbiota?A. BloodB. SkinC. Cerebrospinal fluidD. Deep tissuesE. Internal organs56. Which organism is commonly associated with the normal vaginal microbiota?A. LactobacillusB. Mycobacterium tuberculosisC. Salmonella TyphiD. Vibrio choleraeE. Neisseria meningitidis57. Microbial antagonism refers to the ability of normal microbiota to:A. Inhibit potential pathogens through competition and other mechanismsB. Always cause diseaseC. Eliminate host immune cellsD. Increase pathogen attachmentE. Prevent all microbial growth58. Opportunistic infections are particularly likely to occur in:A. Completely healthy hosts onlyB. Immunosuppressed or otherwise compromised hostsC. Hosts with no microbiotaD. People exposed only to UV lightE. People receiving vaccines59. An organism that causes disease mainly when host defenses are compromised is called a(n):A. Obligate pathogenB. Resident microbiotaC. Opportunistic pathogenD. MutualistE. Commensal only60. An infection caused by microorganisms originating from the patient's own microbiota is:A. Exogenous infectionB. Endogenous infectionC. Iatrogenic infection onlyD. Community-acquired infectionE. Vector-borne infection61. Virulence refers to:A. The ability to form endosporesB. The degree of pathogenicity of a microorganismC. The ability to stain Gram-positiveD. The number of ribosomesE. The host's antibody concentration62. A microbial structure or product that contributes to the ability to cause disease is a:A. Virulence factorB. Therapeutic indexC. Screening testD. Normal microbiotaE. Diagnostic window63. A pathogen that causes disease with a very low infectious dose is generally considered:A. Less virulentB. More virulentC. NonpathogenicD. A commensalE. A probiotic64. The route through which a pathogen enters the host is called the:A. Portal of entryB. ReservoirC. Portal of exitD. Incubation periodE. Focal site65. Which is an example of entry through the parenteral route?A. InhalationB. IngestionC. Skin punctureD. SwallowingE. Sneezing66. Which portal of entry is associated with ingestion of contaminated food or water?A. Gastrointestinal tractB. Respiratory tractC. SkinD. Genitourinary tractE. Conjunctiva only67. Which route is particularly associated with transmission through small respiratory particles?A. Respiratory tractB. Gastrointestinal tractC. Parenteral routeD. Skin onlyE. Genitourinary tract68. An infection acquired from a source outside the host is described as:A. EndogenousB. ExogenousC. LatentD. FocalE. Secondary69. An infection resulting from a person's own microbiota is:A. ExogenousB. EndogenousC. Vector-borneD. ZoonoticE. Iatrogenic only70. An infection confined to a particular body region is a:A. Systemic infectionB. Localized infectionC. Focal infectionD. Mixed infectionE. Secondary infection71. An infection that spreads throughout the body is a:A. Localized infectionB. Systemic infectionC. ColonizationD. Primary infectionE. Subclinical infection72. The presence of microbial toxins in the bloodstream is called:A. ToxemiaB. BacteremiaC. ViremiaD. ColonizationE. Septicemia73. A patient develops influenza followed by bacterial pneumonia. The bacterial pneumonia is best classified as a:A. Secondary infectionB. Primary infectionC. Localized colonizationD. Focal infection onlyE. Subclinical infection74. Which statement best distinguishes exotoxins from endotoxin?A. Exotoxins are always part of Gram-negative outer membranesB. Endotoxin is secreted only by Gram-positive bacteriaC. Exotoxins are generally secreted proteins, whereas endotoxin is associated with Gram-negative LPSD. Both are identical bacterial structuresE. Exotoxins are only produced by viruses75. Which biosafety level is generally associated with work involving Mycobacterium tuberculosis?A. BSL-1B. BSL-2C. BSL-3D. BSL-4E. No biosafety level76. Epidemiology is the study of:A. Only bacterial geneticsB. Distribution and determinants of health-related events in populationsC. Only individual patient treatmentD. Only laboratory stainingE. Only antibiotic mechanisms77. Epidemiologic investigations commonly ask:A. What color is the organism?B. Who, what, where, when, and why/how?C. Which antibiotic is cheapest?D. What is the patient's favorite food?E. Which microscope is newest?78. Florence Nightingale is recognized for important contributions to:A. Viral genome sequencingB. Public health and epidemiology through hospital sanitation and statisticsC. Discovery of antibioticsD. Development of PCRE. Discovery of DNA structure79. John Snow's investigation of cholera is famous for:A. Discovering penicillinB. Mapping cases and identifying a contaminated water sourceC. Developing vaccinationD. Inventing the microscopeE. Discovering viruses80. Prevalence refers to:A. New cases occurring over a periodB. Existing cases in a population at a given time or periodC. Deaths onlyD. Risk of exposure onlyE. Duration of incubation only81. Incidence refers to:A. All existing casesB. New cases occurring in a population during a specified periodC. Total deathsD. Number of recovered patientsE. Number of asymptomatic people only82. Mortality refers to:A. Number of new infectionsB. Number of existing infectionsC. Deaths in a populationD. Number of hospital admissionsE. Number of exposed persons83. An epidemic caused by exposure to a single contaminated source is a:A. Propagated epidemicB. Point-source epidemicC. PandemicD. Endemic diseaseE. Sporadic disease84. An epidemic that spreads progressively from person to person is a:A. Point-source epidemicB. Endemic diseaseC. Propagated epidemicD. Pandemic onlyE. Sporadic outbreak85. A disease that is consistently present at a baseline level in a population or region is:A. PandemicB. EpidemicC. EndemicD. SporadicE. Eradicated86. An epidemic that spreads across countries or continents is called a:A. Localized infectionB. Endemic diseaseC. PandemicD. Point-source outbreakE. Sporadic case87. The first identified case in an outbreak is commonly called the:A. Primary reservoirB. Index caseC. Sentinel caseD. Secondary caseE. Contact case88. The natural history of disease describes:A. Only treatment outcomesB. The sequence of events from disease development through its course and outcomeC. Only microbial geneticsD. Only transmission between countriesE. Only laboratory diagnosis89. A subclinical stage is characterized by:A. Severe symptomsB. Infection or disease without obvious clinical signs and symptomsC. Immediate deathD. Complete absence of infectionE. Permanent immunity90. A screening test is primarily used to:A. Confirm every diagnosisB. Identify people who may have a disease and need further evaluationC. Determine antibiotic MICD. Sterilize specimensE. Identify bacterial endospores91. A patient with a positive screening result should generally undergo:A. Appropriate diagnostic testingB. Immediate surgery in every caseC. No further testingD. Antibiotic treatment regardless of diseaseE. Isolation forever92. Specificity is the ability of a test to correctly identify:A. Diseased individualsB. Non-diseased individualsC. All infected individuals onlyD. New cases onlyE. Fatal cases only93. A false-positive test result occurs when:A. A diseased person tests positiveB. A person without the disease tests positiveC. A diseased person tests negativeD. Everyone tests negativeE. The test is not performed94. Which statement best describes correlation versus causation?A. Correlation alone does not prove that one factor causes anotherB. Correlation always proves causationC. Causation can never be studied epidemiologicallyD. Association and causation are identicalE. Correlation is irrelevant in epidemiology95. Which study follows exposed and unexposed groups over time to compare disease occurrence?A. Case reportB. Case-control studyC. Cohort studyD. Cross-sectional studyE. Ecologic study96. Which study starts with people who have a disease and compares them with people who do not, looking back for exposures?A. Cohort studyB. Case-control studyC. Cross-sectional studyD. Experimental trialE. Surveillance study97. Which study measures exposure and disease status at a particular point or period in time?A. Cohort studyB. Case-control studyC. Cross-sectional studyD. Randomized trialE. Longitudinal experiment98. Which criterion is essential for establishing a causal relationship because the cause must occur before the effect?A. SpecificityB. ConsistencyC. Strength of associationD. TemporalityE. Biological plausibility99. Infections acquired while receiving care in a healthcare setting are called:A. Community-acquired infectionsB. Healthcare-associated infections (HAIs)C. Endogenous infections onlyD. ZoonosesE. Vector-borne diseases100. The systematic collection, analysis, interpretation, and use of health data to monitor disease is:A. ColonizationB. SurveillanceC. PasteurizationD. AntisepsisE. Virulence