A nurse is caring for a client with asthma. Which of the following happens physiologically when bronchospasm occurs?
Decreased mucus production contributes to airway constriction.
Inflammation is reduced due to airway diameter.
Bronchospasm occurs when there is Inflammation, edema, and excess mucus.
Airway obstruction occurs due to thinning mucus.
The Correct Answer is C
Choice A Reason:
Decreased mucus production contributes to airway constriction: This statement is incorrect. Bronchospasm does not decrease mucus production; instead, it primarily affects the smooth muscles surrounding the bronchioles, leading to their constriction and narrowing of the airways. Increased mucus production, often accompanied by inflammation, can contribute to airway obstruction in conditions like asthma.
Choice B Reason:
Inflammation is reduced due to airway diameter: This statement is incorrect. Bronchospasm typically occurs in the setting of inflammation in conditions such as asthma. Constriction of the airways during bronchospasm exacerbates the inflammation and can further narrow the airways, leading to symptoms such as wheezing and dyspnea.
Choice C Reason:
Bronchospasm occurs when there is inflammation, edema, and excess mucus: This statement is partially correct. Bronchospasm often occurs in the presence of inflammation, edema, and excess mucus production, as seen in conditions like asthma. These factors contribute to airway hyperresponsiveness, leading to bronchospasm and airway narrowing.
Choice D Reason:
Airway obstruction occurs due to thinning mucus: This statement is incorrect. Airway obstruction in conditions like asthma is primarily due to bronchospasm, inflammation, and excessive mucus production, rather than thinning mucus. Thinning of mucus would not typically contribute to airway obstruction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A Reason:
Flail chest is incorrect. Flail chest is a condition characterized by multiple rib fractures, causing instability in the chest wall. While it can lead to respiratory distress, it doesn't directly cause ventilation-perfusion (V/Q) mismatch. Instead, it impairs the mechanics of breathing by compromising chest wall integrity.
Choice B Reason:
Emphysema is a chronic obstructive pulmonary disease (COPD) where the alveolar walls are destroyed, leading to a loss of surface area for gas exchange. This results in areas of the lungs that are well-perfused but poorly ventilated, causing a V/Q mismatch. The damage to alveoli leads to impaired ventilation, while blood flow may still be adequate, leading to hypoxemia (low oxygen levels in the blood).
Choice C Reason:
CHF primarily affects the heart’s ability to pump blood effectively, leading to pulmonary congestion and impaired gas exchange. However, it typically causes diffusion defects rather than a direct ventilation-perfusion mismatch. V/Q mismatch may occur secondary to pulmonary edema, but it’s not the primary mechanism of respiratory failure in CHF.
Choice D Reason:
Guillain-Barré syndrome is incorrect. Guillain-Barré syndrome (GBS) is a neurological disorder that affects the peripheral nervous system, leading to muscle weakness and paralysis. While respiratory muscle weakness can occur in GBS, it doesn't directly cause ventilation-perfusion (V/Q) mismatch. GBS primarily affects nerve function rather than lung function.
Correct Answer is ["A","B","D"]
Explanation
Choice A Reason:
Genetics is correct. There is evidence to suggest that genetics play a role in the development of multiple sclerosis. Although no single gene has been identified as the cause of MS, certain genetic variations have been associated with an increased risk of developing the disease. Having a first-degree relative with MS increases an individual's risk, although the overall genetic contribution to MS susceptibility is thought to be relatively modest.
Choice B Reason:
Environmental factors is correct. Environmental factors are believed to play a significant role in the development of multiple sclerosis, particularly in individuals with a genetic predisposition. Factors such as vitamin D deficiency, smoking, exposure to certain infections (such as Epstein-Barr virus), and geographic location (latitude) have been implicated as potential triggers for MS development.
Choice C Reason:
Upper respiratory infections is incorrect. While infections may trigger exacerbations or relapses in individuals with existing multiple sclerosis, there is limited evidence to suggest that upper respiratory infections contribute directly to the development of MS. However, some research suggests that viral infections, particularly those occurring during childhood or adolescence, may influence the risk of developing MS later in life.
Choice D Reason:
Autoimmune factors is correct. Multiple sclerosis is widely recognized as an autoimmune disease, characterized by immune-mediated inflammation and damage to the central nervous system. In MS, the immune system mistakenly attacks myelin, the protective covering of nerve fibers, leading to demyelination and neurological dysfunction. Autoimmune factors are therefore considered central to the pathogenesis of MS.
Choice E Reason:
Urinary tract infections is incorrect. While urinary tract infections (UTIs) are common in individuals with multiple sclerosis due to bladder dysfunction associated with the disease, there is no direct evidence to suggest that UTIs contribute to the development of MS.
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