What manifestations are observed in the early stage of Alzheimer's disease?
Forgets family members.
Irritability.
Impaired reasoning.
Mood swings.
Incontinence.
Correct Answer : B,C,D
Choice A rationale
Forgetting family members is typically a manifestation seen in the middle to late stages of Alzheimer's disease. In the early stage, the cognitive deficits are usually limited to short-term memory loss, such as forgetting recent conversations or where items were placed. As the neurodegeneration progresses to involve the areas of the brain responsible for long-term memory and personal recognition, the individual begins to lose the ability to identify close relatives and familiar faces.
Choice B rationale
Irritability is a common behavioral symptom in the early stages of Alzheimer's disease. As individuals begin to experience subtle cognitive declines and lapses in memory, they often become frustrated or anxious about their inability to perform once-simple tasks. This emotional dysregulation is a reaction to the perceived loss of control and the early neurological changes occurring in the brain regions that help manage mood and responses to stress, often preceding more severe cognitive impairments.
Choice C rationale
Impaired reasoning and judgment are hallmark signs of early-stage Alzheimer's disease. Patients may struggle with complex tasks, such as managing finances, planning a meal, or making sound decisions in social situations. This occurs because the initial accumulation of amyloid plaques and tau tangles often affects the frontal and temporal lobes, which are essential for executive function. While the person may still function independently, their ability to navigate abstract concepts becomes noticeably diminished.
Choice D rationale
Mood swings often emerge early in the progression of Alzheimer's disease. The patient may fluctuate between apathy, depression, and sudden bursts of agitation. These changes are attributed to the early degradation of neurotransmitter systems and the initial damage to the limbic system, which regulates emotions. Families often notice these personality shifts before significant memory loss occurs, as the brain struggles to maintain emotional homeostasis amidst the beginning stages of widespread neuronal death and synapse loss.
Choice E rationale
Incontinence, including the loss of bladder or bowel control, is a symptom associated with the late or severe stages of Alzheimer's disease. It occurs when the neurodegeneration becomes so extensive that the brain can no longer process the signals from the bladder or bowel or coordinate the physical response needed to use the restroom. In the early stage, physical functions like continence remain intact, as the damage is primarily focused on higher-level cognitive and emotional centers.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
During physical exertion, the myocardial oxygen demand increases significantly to sustain an elevated heart rate and contractility. In coronary artery disease, atherosclerotic plaques narrow the arterial lumen, creating a fixed obstruction. This limitation prevents the coronary blood flow from increasing proportionally to the oxygen demand, leading to myocardial ischemia. The resulting anaerobic metabolism produces lactic acid, which stimulates pain receptors, manifesting as the clinical symptom of chest pain or angina.
Choice B rationale
While dehydration can lead to hemoconcentration and a potential increase in blood viscosity, it is not the primary physiological mechanism triggering angina during exercise in a patient with coronary artery disease. Angina is specifically a mismatch between oxygen supply and demand within the cardiac tissue itself. Systemic dehydration would more likely result in tachycardia or hypotension rather than the localized ischemic pain caused by obstructed coronary arteries failing to deliver enough oxygenated blood.
Choice C rationale
Angina is not caused by the heart being overloaded with excessive blood volume, which would typically describe a state of volume overload or congestive heart failure. Instead, angina is a supply-side issue where the blood vessels cannot deliver enough oxygen to meet the metabolic needs of the myocardium. While increased preload can increase the workload of the heart and exacerbate ischemia, the core issue in coronary artery disease is the inability to provide adequate flow.
Choice D rationale
Inflammation of the chest muscles, known as costochondritis or musculoskeletal strain, can cause chest pain that mimics angina, but it is not the cause of true angina pectoris. Angina is specifically cardiac in origin, resulting from ischemia of the heart muscle due to coronary artery narrowing. Chest wall inflammation is usually localized to the musculoskeletal structures and often changes with palpation or specific movements, unlike the deep, pressure-like pain associated with myocardial ischemia.
Correct Answer is D
Explanation
Choice A rationale
A pulmonary embolism is a blockage in one of the pulmonary arteries in the lungs, usually caused by blood clots that travel from the legs. While severe cases can cause right heart strain leading to a slight rise in troponin, it is not the diagnostic marker for the disease. Diagnosis relies on clinical symptoms, D-dimer levels, and imaging studies. Troponin is specific to myocardial cell death, which is not the primary pathological event in a pulmonary embolism.
Choice B rationale
The diagnosis of liver disease involves evaluating liver enzymes such as ALT and AST, along with markers of synthetic function like the International Normalized Ratio (INR) and albumin. Troponin is a contractile protein specific to cardiac and skeletal muscle, with the cardiac isoforms being unique to the heart. It is not found in the liver, and therefore, its presence in the blood does not provide any information regarding the health or disease state of the liver.
Choice C rationale
Congestive heart failure is a clinical syndrome where the heart cannot pump enough blood to meet the body's needs, often diagnosed by a BNP level above 100 pg/mL. While troponin may be elevated in heart failure due to myocardial wall tension, it is not the diagnostic criteria for the condition. The troponin test's main purpose is to rule in or rule out an acute coronary syndrome, specifically myocardial infarction, by detecting cellular necrosis.
Choice D rationale
Myocardial infarction involves the death of heart muscle cells due to prolonged ischemia. Cardiac troponins I and T are highly specific markers of this damage. When the cell membrane of a myocyte is compromised, troponin leaks into the interstitial space and then into the systemic circulation. A rising or falling pattern of troponin levels above the 99th percentile is the definitive biochemical requirement for diagnosing an acute heart attack in a clinical setting.
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