A 45-year-old patient presents with severe abdominal pain, nausea, and vomiting. Laboratory results indicate elevated lipase/amylase. Which organ is primarily affected in this scenario?
Pancreas
Small Intestine
Liver
Stomach
The Correct Answer is A
Choice A reason: Serum lipase and amylase are digestive enzymes produced and secreted by the exocrine pancreas. Elevated levels of these enzymes in the blood are the hallmark diagnostic criteria for acute pancreatitis, reflecting glandular inflammation and damage, which allows the leakage of these intracellular enzymes into the systemic circulation.
Choice B reason: While the small intestine is involved in the final stages of chemical digestion using pancreatic enzymes, it does not synthesize these enzymes. Elevated levels of amylase or lipase would not typically originate from intestinal pathology, as these enzymes are produced in the pancreatic acinar cells and secreted into the duodenum.
Choice C reason: The liver is primarily responsible for bile production, detoxification, and metabolic processing. While liver enzyme elevation is common in hepatobiliary diseases, it does not involve the specific elevation of lipase or amylase, which are specifically reflective of pancreatic inflammatory processes rather than hepatocellular or biliary obstruction.
Choice D reason: The stomach secretes hydrochloric acid and pepsinogen to initiate protein digestion. Although gastric pathologies such as peptic ulcer disease can cause severe abdominal pain and nausea, they do not result in the elevated lipase and amylase levels seen in inflammatory pancreatic conditions or obstruction of the pancreatic duct.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Employment status is a social history factor that is generally not relevant to an acute or subacute report of vision changes. While it may provide context for a person's lifestyle, it does not assist in determining the pathophysiology, onset, or severity of the visual impairment.
Choice B reason: Establishing the time of onset is the most critical first step in the "history of present illness" for any clinical complaint. It helps the clinician determine if the condition is acute, chronic, or progressive, and guides the urgency of further diagnostic testing, such as ruling out retinal detachment or stroke.
Choice C reason: Sensitivity to specific foods is more relevant to an assessment of gastrointestinal function, allergy, or metabolic status. It has no diagnostic link to changes in visual acuity, peripheral vision, or other ophthalmological complaints and would not be a productive line of questioning for this patient.
Choice D reason: Asking about recent travel is relevant if the nurse suspects an infectious disease or environmental exposure (e.g., tropical diseases affecting the eyes). However, for a general report of vision changes, focusing on the temporal nature of the visual symptoms is the most direct and reliable way to gather immediate, relevant clinical data.
Correct Answer is D
Explanation
Choice A reason: The right ventricle receives deoxygenated blood from the right atrium through the tricuspid valve. It is responsible for pumping this deoxygenated blood into the pulmonary circulation via the pulmonary artery to be oxygenated in the lungs, not for receiving oxygenated blood from the veins.
Choice B reason: The right atrium receives deoxygenated systemic venous blood returning from the body via the superior and inferior vena cava. It serves as the initial collection chamber for the right side of the heart, which is dedicated to the pulmonary circulation circuit, not the systemic oxygenated circuit.
Choice C reason: The left ventricle receives oxygenated blood from the left atrium through the mitral valve. It is the thick-walled muscular chamber responsible for pumping this oxygenated blood out through the aorta to the rest of the systemic circulation to meet the body's metabolic demands.
Choice D reason: The left atrium is the receiving chamber for the four pulmonary veins, which carry oxygen-rich blood back to the heart from the lungs. This chamber holds the oxygenated blood before it passes through the mitral valve into the left ventricle for systemic distribution.
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