Which statement indicates understanding by a client diagnosed with multiple sclerosis?
This disease affects the peripheral nervous system only.
A blood test will confirm this diagnosis.
This disease involves the loss of myelin in my central nervous system.
My symptoms will be the same every day.
The Correct Answer is C
Choice A rationale
Multiple sclerosis is a chronic autoimmune disease that specifically targets the central nervous system, which includes the brain and spinal cord. It does not primarily affect the peripheral nervous system, which consists of the nerves outside these structures. Peripheral nerve issues are more characteristic of conditions like Guillain-Barre syndrome or peripheral neuropathy. Understanding that MS is a central nervous system disorder is vital for recognizing the types of neurological deficits and imaging findings expected during diagnosis.
Choice B rationale
There is no single definitive blood test that can confirm a diagnosis of multiple sclerosis. Diagnosis is usually based on clinical findings, magnetic resonance imaging showing lesions disseminated in time and space, and sometimes cerebrospinal fluid analysis for oligoclonal bands. Blood tests are primarily used to rule out other conditions that mimic MS, such as systemic lupus erythematosus or vitamin B12 deficiency. Relying solely on a blood test suggests a misunderstanding of the diagnostic process.
Choice C rationale
Multiple sclerosis is characterized by an immune-mediated attack on the myelin sheath, which is the protective insulation surrounding nerve fibers in the central nervous system. This process of demyelination disrupts the normal transmission of electrical impulses, leading to various neurological symptoms. By correctly identifying that the disease involves the loss of myelin within the central nervous system, the client demonstrates an accurate understanding of the underlying pathophysiology and the reason for their varied physical and cognitive symptoms.
Choice D rationale
The clinical course of multiple sclerosis is typically characterized by unpredictable relapses and remissions or a steady progression of symptoms. It is very rare for symptoms to remain exactly the same every day; instead, patients often experience fluctuations in fatigue, motor strength, and sensory perception depending on disease activity and external factors like heat or stress. Believing that symptoms will be identical daily shows a lack of awareness regarding the episodic and variable nature of MS.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Diverticulosis is a condition where small, bulging pouches develop in the digestive tract, most commonly in the colon. The primary risk factors for diverticulosis include a low fiber diet, obesity, and aging, which lead to increased intraluminal pressure. There is no established scientific link between Helicobacter pylori infection and the formation of diverticula in the large intestine.
H. pylori specifically colonizes the acidic environment of the stomach and the proximal duodenum.
Choice B rationale
Appendicitis is the inflammation of the appendix, often caused by a blockage in the lining of the appendix that results in infection. While various bacteria can be involved in the infection once the appendix is obstructed, H. pylori is not a recognized causative agent for this condition. Appendicitis is typically an acute surgical emergency triggered by fecaliths or lymphoid hyperplasia, whereas H. pylori is associated with chronic inflammatory changes in the gastric mucosa.
Choice C rationale
Cirrhosis is the late stage of scarring of the liver caused by many forms of liver diseases and conditions, such as hepatitis and chronic alcoholism. The pathophysiology of cirrhosis involves the replacement of healthy liver tissue with scar tissue, eventually preventing the liver from functioning properly.
H. pylori is a bacterium that affects the gastrointestinal mucosa of the stomach and duodenum. It does not play a direct role in the development of hepatic fibrosis or cirrhosis.
Choice D rationale
Helicobacter pylori is a gram negative bacterium that survives in the stomach by producing urease, which neutralizes gastric acid. This infection causes chronic inflammation of the gastric lining, which weakens the protective mucous layer. This allows stomach acid to reach the sensitive tissue underneath, leading to the formation of peptic ulcers in the stomach or duodenum. Most cases of peptic ulcer disease are caused by either H. pylori infection or the long term use of NSAIDs.
Correct Answer is C
Explanation
Choice A rationale
Heart rate is the frequency of cardiac cycles measured in beats per minute. This parameter represents the chronotropic state of the heart rather than a volume-related measurement. Normal resting adult heart rate typically ranges from 60 to 100 beats per minute. Preload specifically concerns the end-diastolic volume, whereas Choice A describes a temporal measure of cardiac activity that contributes to total cardiac output but does not define the mechanical stretching of the ventricular fibers before contraction.
Choice B rationale
This description refers to afterload, which is the systemic vascular resistance the left ventricle must push against during systole. Afterload is determined by factors like aortic pressure and systemic vascular tone. While preload is a volume measurement occurring before contraction, afterload is the tension or stress developed in the wall of the left ventricle during ejection. Increased afterload can lead to decreased stroke volume if the heart cannot compensate for the increased resistance within the arterial system.
Choice C rationale
Preload is defined as the initial stretching of the cardiac myocytes prior to contraction. It is directly related to ventricular filling and the end-diastolic volume. According to the Frank-Starling law, as preload increases, the force of contraction increases to a point. Normal central venous pressure, which reflects right-sided preload, is 2 to 6 mmHg. Increasing blood return to the heart stretches the myocardial fibers, optimizing the overlap of actin and myosin filaments for an effective contraction.
Choice D rationale
This statement describes diastolic blood pressure, which is the minimum pressure remaining in the arteries when the heart is in a state of relaxation. Normal diastolic blood pressure for an adult is typically less than 80 mmHg. While this occurs during the same phase of the cardiac cycle as preload, it measures the pressure exerted on vessel walls rather than the volume or stretch within the cardiac chambers themselves. It is a component of systemic vascular resistance.
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