A nurse studying infection control learns that which factor is the most effective and crucial barrier to infection?

Skin and mucous membranes

Gastrointestinal secretions

Colonization by host bacteria

Inflammatory processes

Answer and Explanation

The Correct Answer is A

Choice A rationale:
Skin and mucous membranes are the most effective and crucial barriers to infection. They provide a continuous physical barrier that prevents pathogens from entering the body. Here's a detailed explanation of their protective mechanisms:
1.   Physical Barrier:
Skin: The outermost layer of skin, the epidermis, is composed of tightly packed cells that are difficult for pathogens to penetrate. It's also covered in a layer of sebum, an oily substance that helps to repel water and microorganisms.
Mucous membranes: These moist linings cover the openings of the body, such as the nose, mouth, eyes, and digestive, respiratory, and urogenital tracts. They produce mucus, a sticky substance that traps pathogens and prevents them from entering the body. Mucus also contains enzymes and antibodies that can kill certain pathogens.
2.   Chemical Barrier:
Skin and mucous membranes secrete a variety of substances that have antimicrobial properties. These include: Sebum: Contains fatty acids that can kill bacteria and fungi.
Sweat: Contains salt and lysozyme, an enzyme that can break down bacterial cell walls. Saliva: Contains enzymes that can break down food and kill bacteria.
Gastric acid: The highly acidic environment of the stomach kills most pathogens that are ingested.
3.   Immune Barrier:
Skin and mucous membranes are home to a diverse community of microbes, known as the microbiome. These microbes play an important role in protecting against infection by competing with pathogens for resources and space.
Mucous membranes contain specialized immune cells, such as M cells and dendritic cells, that can recognize pathogens and initiate an immune response.
In contrast, the other choices are less effective barriers to infection:
Choice B: Gastrointestinal secretions, such as gastric acid, do play a role in preventing infection, but they are not as effective as skin and mucous membranes. Pathogens can still enter the body through the digestive tract, even in the presence of gastric acid.
Choice C: Colonization by host bacteria can actually help to protect against infection by competing with pathogens. However, it is not a primary barrier to infection.
Choice D: Inflammatory processes are a response to infection, not a barrier to it. They occur after pathogens have already entered the body.

Nursing Test Bank

Quiz #1: RN Exams Pharmacology Exams Quiz #2: RN Exams Medical-Surgical Exams Quiz #3: RN Exams Fundamentals Exams Quiz #4: RN Exams Maternal-Newborn Exams Quiz #5: RN Exams Anatomy and Physiology Exams Quiz #6: RN Exams Obstetrics and Pediatrics Exams Quiz #7: RN Exams Fluid and Electrolytes Exams Quiz #8: RN Exams Community Health Exams Quiz #9: RN Exams Promoting Health across the lifespan Exams Quiz #10: RN Exams Multidimensional care Exams

Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Quiz #1: Naxlex RN Comprehensive online practice 2019 B with NGN Quiz #2: Naxlex RN Comprehensive Predictor 2023 Quiz #3: Naxlex RN Comprehensive Predictor 2023 Exit Exam A Quiz #4: Naxlex HESI Exit LPN Exam Quiz #5: Naxlex PN Comprehensive Predictor PN 2020 Quiz #6: Naxlex VATI PN Comprehensive Predictor 2020 Quiz #8: Naxlex PN Comprehensive Predictor 2023 - Exam 1 Quiz #10: Naxlex HESI PN Exit exam Quiz #11: Naxlex HESI PN EXIT Exam 2

Free Nursing Study Resources

Correct Answer is A

Explanation

Choice A rationale:
Hyperventilation is a condition characterized by rapid and deep breathing, leading to excessive removal of carbon dioxide (CO2) from the body. This decrease in CO2 levels actually causes respiratory alkalosis, not respiratory acidosis.
CO2 is a weak acid, and its removal from the blood raises the blood pH, making it more alkaline. Key mechanisms involved in hyperventilation-induced respiratory alkalosis:
Increased alveolar ventilation: Hyperventilation increases the rate at which CO2 is expelled from the lungs, reducing its concentration in the blood.
Shift in the equilibrium of the carbonic acid-bicarbonate buffer system: The reduction in CO2 levels drives the equilibrium towards the formation of bicarbonate ions, further reducing the concentration of hydrogen ions and increasing pH.
Renal compensation: The kidneys respond to respiratory alkalosis by excreting more bicarbonate ions, which helps to normalize the blood pH.
Choice B rationale:
Asthma is a chronic respiratory disease characterized by inflammation and narrowing of the airways. This can lead to impaired ventilation and retention of CO2, which can contribute to respiratory acidosis.
Mechanisms by which asthma can cause respiratory acidosis:
Bronchoconstriction: Narrowed airways impede airflow, making it difficult to expel CO2 from the lungs.
Air trapping: Inflammation and mucus production can lead to air becoming trapped in the lungs, further increasing CO2 levels.
Hypoventilation: Severe asthma attacks can cause respiratory muscle fatigue, leading to a decrease in breathing rate and inadequate CO2 removal.
Choice C rationale:
Chronic obstructive pulmonary disease (COPD) is a group of lung diseases characterized by chronic obstruction of airflow. This obstruction can lead to impaired ventilation and retention of CO2, which can contribute to respiratory acidosis.
Mechanisms by which COPD can cause respiratory acidosis:
Emphysema: Destruction of lung tissue reduces the surface area available for gas exchange, making it difficult to expel CO2. Chronic bronchitis: Inflammation and mucus production in the airways can obstruct airflow and trap CO2 in the lungs.
Hypoventilation: COPD can lead to respiratory muscle fatigue and a decrease in breathing rate, further impairing CO2 removal.
Choice D rationale:
Pulmonary embolism (PE) is a blockage of an artery in the lungs, usually by a blood clot. This can lead to impaired gas exchange and a decrease in oxygen levels in the blood. In severe cases, PE can also cause respiratory acidosis due to inadequate CO2 removal.
Mechanisms by which PE can cause respiratory acidosis:
Ventilation-perfusion mismatch: PE obstructs blood flow to a portion of the lungs, reducing the amount of CO2 that can be removed from those areas.
Hypoxemia: Low oxygen levels in the blood can stimulate the respiratory drive, leading to hyperventilation and CO2 retention.
Right heart failure: PE can strain the right side of the heart, leading to decreased pulmonary blood flow and impaired CO2 removal.

A. You are at risk for seizures due to fungal infections. B. I have no idea why you would be taking this drug. C. Gabapentin can also function as an antidepressant. D. This medication aids in alleviating pain from nerve irritation.

Correct Answer is D

Explanation

Choice A rationale:
It is not accurate to state that the patient is at risk for seizures due to fungal infections. While fungal infections can occur in individuals with HIV-1, they are not a primary cause of seizures in this population.
Linking fungal infections directly to seizure risk without clear evidence could cause unnecessary anxiety in the patient. It's important to provide accurate and relevant information to patients.
Choice B rationale:
Responding with "I have no idea why you would be taking this drug" is unprofessional and unhelpful.
Nurses are expected to have a basic understanding of the medications their patients are taking and to be able to provide education and support.
It's essential to demonstrate knowledge and confidence when interacting with patients.
Choice C rationale:
While gabapentin can have mood-elevating effects in some individuals, it is not primarily used as an antidepressant. Mentioning this potential side effect without clarifying the primary purpose of the medication could mislead the patient. It's crucial to prioritize the main indication for the medication to avoid confusion.
Choice D rationale:
This is the most appropriate response because it accurately explains the primary reason for prescribing gabapentin to this patient.
Gabapentin is commonly used to treat neuropathic pain, which is pain caused by nerve damage.
HIV-1 can often lead to neuropathic pain, making gabapentin a valuable treatment option in this population.
Providing clear and accurate information about medication purpose builds trust and understanding between the nurse and the patient.

View Question and Answer

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

A nurse studying infection control learns that which factor is the most effective and crucial barrier to infection?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Which of the following is not a cause of respiratory acidosis?

Correct Answer is A

Explanation

A patient with HIV-1 is curious as to why gabapentin is included in their medication regimen, despite not having a history of seizures. What would be the most appropriate response from the nurse?

Correct Answer is D

Explanation

While assessing a patient who has just arrived from the Post Anesthesia Care Unit (PACU), the nurse hears stridor. What is the first action the nurse should take?

A patient about to undergo surgery is expressing anxiety. Which nurse’s response is most likely to encourage further conversation with the patient?

A nurse is conversing with a colleague who is relocating to another state and is in search of a new job. What advice from the nurse would be most beneficial?

A patient has recently been diagnosed with systemic lupus erythematosus and is discussing self-care strategies with the nurse. Which statement from the patient suggests a need for further review of the material?

A nurse is educating a client who is prescribed a central vascular access device and is transferring to a skilled facility for long-term treatment. Which statement should the nurse include in this client’s teaching?

A client has urinary incontinence. Which assessment finding indicates that outcomes for a priority nursing diagnosis have been met?

A nurse is caring for several clients in the morning prior to surgery. Which medications taken by the clients necessitate a consultation with the primary health care provider regarding their administration? (Select all that apply.)

A nurse is studying the differences between normal cells and benign tumor cells. What information is included in this?