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: Exudative fluid is not the type of fluid drained from the patient. Exudative fluid is a high-protein fluid that results from inflammation or infection of the pleura. It is usually cloudy and contains white blood cells, bacteria, or blood.
Choice B reason: Purulent fluid is not the type of fluid drained from the patient. Purulent fluid is a thick, yellow-green fluid that results from a bacterial infection of the pleura. It is also known as empyema and contains pus and dead tissue.
Choice C reason: Transudative fluid is the type of fluid drained from the patient. Transudative fluid is a low-protein fluid that results from increased hydrostatic pressure or decreased oncotic pressure in the pleural space. It is usually clear and contains few cells or organisms. It can be caused by conditions such as heart failure, cirrhosis, or nephrotic syndrome.
Choice D reason: Infectious fluid is not the type of fluid drained from the patient. Infectious fluid is a general term that can refer to any fluid that contains microorganisms that cause disease. It can be exudative or purulent, depending on the type and severity of the infection.
Correct Answer is D
Explanation
Choice A reason: Abnormally dilated arteries and veins are not a result of atherosclerosis. They are a sign of aneurysms or varicose veins, which are caused by different factors.
Choice B reason: Arterial wall thinning and weakening are not a result of atherosclerosis. They are a sign of arteriosclerosis, which is a general term for the loss of elasticity and flexibility of the arteries.
Choice C reason: Autonomic nervous system imbalances are not a result of atherosclerosis. They are a sign of dysautonomia, which is a disorder of the nervous system that affects the regulation of vital functions.
Choice D reason: Abnormal thickening and hardening of vessel walls are a result of atherosclerosis. They are caused by the accumulation of plaque, which is composed of cholesterol, fatty substances, calcium, and other materials.
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