NUR 507 midterm exam 4 Chamberlain University
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Free NUR 507 midterm exam 4 Chamberlain University Questions
Which of the following is recommended in diagnosing an uncomplicated urinary tract infection (UTI)?
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Urine culture to identify specific bacteria causing the UTI
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Urine dipstick to identify leukocyte esterase or nitrite reductase
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Renal ultrasound
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Urinalysis to identify the red blood cells (RBCs)
Explanation
Explanation:
Correct Answer: (B) Urine dipstick to identify leukocyte esterase or nitrite reductase
For an uncomplicated UTI, a urine dipstick test is a quick and practical diagnostic tool that detects leukocyte esterase, indicating white blood cells, and nitrites, which suggest the presence of certain bacteria. This simple test is typically sufficient for diagnosis in straightforward cases without the need for more invasive or extensive testing.
Why Other Options are Incorrect:
A. Urine culture to identify specific bacteria causing the UTI Urine culture is generally reserved for complicated UTIs, recurrent infections, or cases where initial treatment fails, rather than for routine uncomplicated UTI diagnosis.
C. Renal ultrasound This imaging study is not necessary for diagnosing an uncomplicated UTI and is typically reserved for evaluating complications or recurrent infections.
D. Urinalysis to identify the red blood cells (RBCs) While hematuria can occur with UTIs, identifying RBCs specifically is not the primary diagnostic approach for confirming an uncomplicated UTI.
What is the consequence of decreased renal production of vitamin D on the body?
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Impaired bone mineralization and increased risk of fractures
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Elevated levels of parathyroid hormone (PTH)
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Increased absorption of calcium from the intestine
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Enhanced excretion of phosphate by the kidneys
Explanation
Explanation:
Correct Answer: (B) Elevated levels of parathyroid hormone (PTH)
Decreased renal production of active vitamin D leads to reduced intestinal calcium absorption, resulting in lower serum calcium levels. This drop in calcium stimulates the parathyroid glands to secrete more parathyroid hormone in an attempt to compensate, leading to secondary hyperparathyroidism.
Why Other Options are Incorrect:
A. Impaired bone mineralization and increased risk of fractures While this is a downstream consequence of chronic vitamin D deficiency and secondary hyperparathyroidism, it is a later complication rather than the immediate consequence of decreased vitamin D production.
C. Increased absorption of calcium from the intestine Decreased vitamin D actually leads to decreased, not increased, calcium absorption from the intestine.
D. Enhanced excretion of phosphate by the kidneys In kidney disease with decreased vitamin D, phosphate excretion is typically impaired, contributing to hyperphosphatemia rather than enhanced excretion.
Which of the following would indicate air trapping in a patient with COPD?
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Decreased residual volume
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Normal residual volume
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Increased residual volume
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Decreased total lung volume
Explanation
Explanation:
Correct Answer: (C) Increased residual volume
Air trapping is a hallmark feature of COPD, resulting from the collapse of small airways during expiration due to loss of elastic recoil and airway obstruction. This prevents complete exhalation, causing air to remain trapped in the alveoli. The residual volume, which is the amount of air remaining in the lungs after maximal exhalation, is therefore significantly increased in COPD patients with air trapping, contributing to hyperinflation and the characteristic barrel chest appearance.
Why Other Options Are Incorrect:
A. Decreased residual volume A decreased residual volume would suggest that the lungs are able to expel more air than normal, which is the opposite of what occurs in COPD. This finding would be more consistent with restrictive lung disease or normal healthy lung function.
B. Normal residual volume A normal residual volume would indicate that air trapping is not occurring. In established COPD with air trapping, pulmonary function testing consistently demonstrates elevated residual volume as a defining abnormality of obstructive physiology.
D. Decreased total lung volume Decreased total lung volume is characteristic of restrictive respiratory disorders, where lung expansion is limited by fibrosis, chest wall abnormalities, or muscle weakness. In COPD, total lung capacity is typically increased due to hyperinflation, not decreased.
Among the following individuals below, who is most at risk for developing benign prostatic hypertrophy (BPH)?
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A 50-year-old male with hypertension
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A 60-year-old male with a family history of BPH
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A 45-year-old male who consumes a diet high in monounsaturated fatty acids
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A 30-year-old male with a history of sexually transmitted infections
Explanation
Explanation:
Correct Answer: (B) A 60-year-old male with a family history of BPH
Advanced age and family history are two of the most significant risk factors for developing BPH. This individual has both risk factors present: he is older, and the risk of BPH increases progressively with age, while a family history further raises his likelihood of developing this condition due to genetic predisposition.
Why Other Options are Incorrect:
A. A 50-year-old male with hypertension While age is a relevant factor, hypertension is not a primary established risk factor for BPH.
C. A 45-year-old male who consumes a diet high in monounsaturated fatty acids This individual is younger and diets high in monounsaturated fatty acids are not established risk factors for BPH.
D. A 30-year-old male with a history of sexually transmitted infections This individual is significantly younger than the typical age range for BPH risk, and STI history is not a primary risk factor for this condition.
Which of the following individuals is most likely to have a restrictive lung disorder?
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A 70-year-old retired librarian with interstitial lung disease
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A 60-year-old farmer with a prolonged cough and sputum production
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A 50-year-old office worker with a history of chronic obstructive pulmonary disease
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A 30-year-old smoker with chronic bronchitis
Explanation
Correct Answer: A) A 70-year-old retired librarian with interstitial lung disease
Restrictive lung disorders are characterized by reduced lung volumes due to stiffening or scarring of the lung tissue, making it difficult to fully expand the lungs. Interstitial lung disease is a classic cause of restrictive lung pathology, as the progressive fibrosis of the interstitium reduces lung compliance and total lung capacity while preserving or even increasing the FEV1/FVC ratio.
A 60-year-old farmer with chronic cough and sputum production suggests chronic bronchitis, an obstructive condition. COPD is a prototypical obstructive lung disease characterized by airflow limitation, not restriction. Chronic bronchitis in a smoker is also an obstructive disorder. All three remaining options describe obstructive, not restrictive, pathology.
Which of the following risk factors is most strongly associated with the development of esophageal stricture?
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Long-term cigarette smoking
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Regular intake of nonsteroidal anti-inflammatory drugs (NSAIDs)
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Chronic gastroesophageal reflux disease (GERD)
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Eating frequent citrus fruits
Explanation
Explanation:
Correct Answer: (C) Chronic gastroesophageal reflux disease (GERD)
Chronic GERD is the most strongly associated risk factor for esophageal stricture. Repeated exposure of the esophageal mucosa to gastric acid causes inflammation, ulceration, and over time leads to fibrosis and scar tissue formation. This scarring narrows the esophageal lumen, resulting in a peptic stricture, which is the most common type of benign esophageal stricture.
Why Other Options Are Incorrect:
A. Long-term cigarette smoking While smoking is a risk factor for esophageal cancer and can worsen GERD by relaxing the lower esophageal sphincter, it is not the most strongly or directly associated risk factor for the development of esophageal stricture specifically.
B. Regular intake of nonsteroidal anti-inflammatory drugs (NSAIDs) NSAIDs can irritate the esophageal and gastric mucosa and may contribute to esophageal injury, but they are not the primary or most strongly established cause of esophageal stricture compared to chronic acid exposure from GERD.
D. Eating frequent citrus fruits Citrus fruits are acidic and may trigger GERD symptoms, but their direct consumption does not cause the sustained mucosal injury and fibrotic remodeling necessary to produce an esophageal stricture.
During inhalation, which of the following changes occurs in the thoracic cavity that facilitates air entry into the lungs?
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Contraction of the diaphragm and an increase in its dome shape
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Contraction of the trachea and a decrease in its diameter
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Expansion of the alveoli and an increase in surface tension
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Relaxation of the intercostal muscles and a decrease in ribcage expansion
Explanation
Explanation:
Correct Answer: (A) Contraction of the diaphragm and an increase in its dome shape During inhalation, the diaphragm contracts, causing it to move downward and flatten, which increases the vertical dimension of the thoracic cavity. This expansion decreases intrathoracic pressure relative to atmospheric pressure, drawing air into the lungs.
Why Other Options are Incorrect:
B. Contraction of the trachea and a decrease in its diameter — The trachea does not contract to facilitate breathing; it remains a rigid, open passageway due to cartilaginous rings.
C. Expansion of the alveoli and an increase in surface tension — Increased surface tension would actually impede alveolar expansion; surfactant works to reduce surface tension and facilitate alveolar opening.
D. Relaxation of the intercostal muscles and a decrease in ribcage expansion — During inhalation, the intercostal muscles contract, not relax, to elevate the ribcage and increase thoracic volume.
A 45-year-old patient presents to the clinic with complaints of frequent heartburn, regurgitation, and a bitter taste in the mouth. The symptoms worsen after meals and when lying down. The nurse practitioner (NP) suspects gastroesophageal reflux disease (GERD). Which action by the NP is most appropriate during this office visit?
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Scheduling the patient for an immediate upper endoscopy
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Recommending lifestyle modifications, such as elevating the head of the bed
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Instructing the patient to lie down immediately after meals
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Administering an antacid as needed
Explanation
Explanation:
Correct Answer: (B) Recommending lifestyle modifications, such as elevating the head of the bed
For a newly presenting patient with classic GERD symptoms without alarm features such as dysphagia, weight loss, or bleeding, the most appropriate initial intervention is lifestyle modification. Elevating the head of the bed by 6 to 8 inches uses gravity to prevent nocturnal acid reflux, and is part of a comprehensive lifestyle approach that also includes avoiding meals within three hours of lying down, reducing trigger foods, losing weight if overweight, and avoiding tight-fitting clothing. These modifications are the cornerstone of first-line GERD management before escalating to pharmacotherapy or diagnostics.
Why Other Options Are Incorrect:
A. Scheduling the patient for an immediate upper endoscopy Immediate upper endoscopy is not indicated for a straightforward initial presentation of GERD without alarm symptoms. Endoscopy is reserved for patients with warning signs such as dysphagia, odynophagia, unintentional weight loss, gastrointestinal bleeding, or symptoms refractory to therapy, or for patients over 45 to 50 with new onset symptoms to rule out Barrett's esophagus.
C. Instructing the patient to lie down immediately after meals Lying down shortly after eating increases gastroesophageal reflux by reducing the gravitational barrier against acid movement into the esophagus. This instruction would directly worsen the patient's symptoms and is contraindicated in GERD management.
D. Administering an antacid as needed While antacids can provide short-term symptom relief, they are not the most comprehensive or appropriate first response during an initial office visit for GERD. Addressing the underlying behavioral and lifestyle contributors through education is the more impactful and guideline-recommended first step.
Which of the following hormones contributes to the development of insulin resistance in the gastrointestinal tract?
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Ghrelin
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Pepsin
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Glucagon
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Glucophage
Explanation
Explanation:
Correct Answer: (A) Ghrelin
Ghrelin is a peptide hormone primarily produced by the stomach that stimulates appetite and plays a role in energy balance and glucose metabolism. Elevated ghrelin levels have been associated with impaired insulin signaling and increased insulin resistance. Ghrelin activates growth hormone secretagogue receptors that interfere with insulin receptor substrate pathways in gastrointestinal and peripheral tissues, contributing to metabolic dysregulation and insulin resistance, particularly in obesity and type 2 diabetes.
Why Other Options Are Incorrect:
B. Pepsin Pepsin is a digestive enzyme produced in the stomach from its precursor pepsinogen, responsible for protein digestion in the acidic gastric environment. It has no hormonal function and plays no role in insulin signaling or the development of insulin resistance.
C. Glucagon Glucagon is a pancreatic hormone that raises blood glucose by stimulating hepatic glycogenolysis and gluconeogenesis. While glucagon opposes insulin action and elevated glucagon levels can worsen hyperglycemia, it is a pancreatic rather than gastrointestinal hormone and is not the primary contributor to insulin resistance in the gastrointestinal tract specifically.
D. Glucophage Glucophage is the brand name for metformin, a widely used antidiabetic medication that actually reduces insulin resistance and lowers blood glucose. It is a pharmacological agent, not a hormone, and it works against insulin resistance rather than contributing to its development.
Untreated Stage 5 chronic kidney disease (CKD) will result in which of the following symptoms?
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Severe hypertension
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Anemia
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All the choices are correct
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Hyperphosphatemia
Explanation
Correct Answer: C) All the choices are correct
Stage 5 CKD, also known as end-stage renal disease (ESRD), involves near-total or complete loss of kidney function, leading to a systemic accumulation of complications across multiple organ systems. Severe hypertension develops due to fluid retention, activation of the renin-angiotensin-aldosterone system, and impaired sodium excretion. Anemia results from markedly decreased erythropoietin production by the failing kidneys, leading to reduced red blood cell production. Hyperphosphatemia occurs because the kidneys can no longer excrete phosphate effectively, causing it to accumulate in the blood and contributing to secondary hyperparathyroidism and vascular calcification.
Since severe hypertension, anemia, and hyperphosphatemia are all well-established and expected complications of untreated Stage 5 CKD, all choices are correct and reflect the multisystem consequences of end-stage renal failure.
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