A nurse is preparing to teach the staff about asthma. Which information should the nurse include? Airway hyper-responsiveness in extrinsic asthma is related to:
hereditary decrease in IgE responsiveness.
increased sympathetic nervous system response.
the release of stress hormones.
exposure to an allergen causing mast cell degranulation.
The Correct Answer is D
Choice A reason: Hereditary decrease in IgE responsiveness is not related to airway hyper-responsiveness in extrinsic asthma. IgE is an antibody that binds to allergens and triggers the release of histamine and other inflammatory mediators from mast cells. A decrease in IgE responsiveness would reduce the allergic reaction, not increase it.
Choice B reason: Increased sympathetic nervous system response is not related to airway hyper-responsiveness in extrinsic asthma. The sympathetic nervous system is the part of the autonomic nervous system that prepares the body for fight or flight. It stimulates the bronchodilation, or the widening of the airways, by activating the beta2 receptors on the smooth muscle cells. This would improve the airflow, not obstruct it.
Choice C reason: The release of stress hormones is not related to airway hyper-responsiveness in extrinsic asthma. Stress hormones, such as cortisol and adrenaline, are secreted by the adrenal glands in response to stress. They have anti-inflammatory and bronchodilator effects, which would reduce the symptoms of asthma, not worsen them.
Choice D reason: Exposure to an allergen causing mast cell degranulation is related to airway hyper-responsiveness in extrinsic asthma. Mast cell degranulation is the process of releasing histamine and other inflammatory mediators from the granules inside the mast cells. These substances cause bronchoconstriction, or the narrowing of the airways, by stimulating the smooth muscle contraction and mucus secretion. This leads to the symptoms of asthma, such as wheezing, coughing, and dyspnea.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: This is not an adverse effect of ACE inhibitors. Constipation is a common side effect of opioid medications, which slow down the intestinal motility and cause hard stools.
Choice B reason: This is not an adverse effect of ACE inhibitors. Hypokalemia is a low level of potassium in the blood, which can be caused by diuretic medications, such as furosemide or hydrochlorothiazide, which increase the urine output and potassium excretion.
Choice C reason: This is an adverse effect of ACE inhibitors. Chronic cough is a dry, persistent cough that occurs in some patients taking ACE inhibitors, due to the accumulation of bradykinin, a substance that causes inflammation and irritation in the respiratory tract.
Choice D reason: This is not an adverse effect of ACE inhibitors. Nervousness is a common side effect of stimulant medications, such as caffeine or amphetamine, which increase the activity of the central nervous system and cause anxiety, agitation, and insomnia.
Correct Answer is B
Explanation
Choice A reason: This is not the preferred agent for the initial treatment of heart failure. Vasodilators are a class of medications that lower the blood pressure by relaxing the blood vessels and reducing the resistance to blood flow. They can be used to treat hypertension, angina, and heart failure, but they are usually added to other medications, such as diuretics or beta blockers, to improve the symptoms and outcomes.
Choice B reason: This is the preferred agent for the initial treatment of heart failure. Diuretics are a class of medications that increase the urine output and reduce the fluid retention in the body. They can be used to treat hypertension, edema, and heart failure, as they reduce the preload and afterload on the heart, and decrease the pulmonary congestion and peripheral edema.
Choice C reason: This is not the preferred agent for the initial treatment of heart failure. Calcium channel blockers are a class of medications that lower the blood pressure and heart rate by blocking the calcium channels in the heart and blood vessels, which cause vasodilation and reduced cardiac contractility. They can be used to treat hypertension, angina, and arrhythmias, but they are not recommended for most patients with heart failure, as they may worsen the cardiac function and increase the mortality.
Choice D reason: This is not the preferred agent for the initial treatment of heart failure. Direct renin inhibitors are a class of medications that lower the blood pressure by inhibiting the enzyme renin, which initiates the renin-angiotensin-aldosterone system, a hormonal pathway that regulates the blood pressure and fluid balance. They can be used to treat hypertension, but they have not been proven to be effective or safe for patients with heart failure.
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