| Course | HS200 Diseases of the Human Body |
|---|---|
| Unit | Unit 5 |
| Paper type | Case scenario analysis |
| Length | About 870 words, 6 pages double-spaced |
| Format | APA 7 student paper |
| School | Purdue University Global |
| Program | BS in Health Science |
| Updated | October 2026 |
Free sample paper for HS200 Unit 5
Yellow Skin, Dark Urine, Pale Stools: A Unit 5 Case Scenario Analysis Arguing for a Single Blocked Bile Duct
[Student Name]
Purdue University Global
HS200: Diseases of the Human Body
Unit 5 Case Scenario Analysis
[Instructor Name]
[Date]
The patient is composite; the review and textbook cited are real.
The Findings
A composite 48-year-old woman has had episodes of pain under her right ribs after fatty meals for several months. This week the pain lasted longer, and two days later her family noticed her eyes and skin turning yellow. She reports itching all over, urine the color of tea and stools that look pale, almost clay-colored. She has no fever. Blood tests show a high level of bilirubin, mostly the conjugated form, and a high alkaline phosphatase, with only mildly raised liver cell enzymes.
Background: The Bilirubin Pathway
When aging red blood cells are removed, their hemoglobin is broken down, and bilirubin is one of the products. It travels in the blood to the liver in an unconjugated form that does not dissolve in water. Liver cells attach it to another molecule, conjugating it, which makes it water-soluble, and then secrete it into bile. Bile flows through small ducts into the common bile duct, which empties into the small intestine. There, bacteria convert bilirubin into pigments that give stool its brown color. A small amount is reabsorbed and leaves in the urine, giving it a light yellow tint (Rogers, 2023).
The Proposed Process: Obstruction of the Common Bile Duct
The analysis proposes that a gallstone has moved out of the gallbladder and lodged in the common bile duct, a condition called choledocholithiasis. Gallstones form when bile contains more cholesterol than it can keep dissolved, and the gallbladder's contraction after fatty meals can push a stone into the duct (Lammert et al., 2016).
Testing the Process Against Each Finding
Pain after fatty meals. Fat in the intestine triggers the gallbladder to contract against stones or a blocked duct, causing pain under the right ribs. Explained.
Yellow skin and eyes. Conjugated bilirubin made by the liver cannot drain into the intestine, so it backs up into the blood and deposits in tissues. Explained.
Dark urine. Conjugated bilirubin is water-soluble, so the excess passes into the urine, darkening it. Unconjugated bilirubin would not do this. Explained.
Pale stools. Little bilirubin reaches the intestine, so the brown pigments are not formed. Explained.
Itching. Bile salts back up into the blood and skin along with bilirubin and are thought to contribute to itching. Explained.
Laboratory pattern. Mostly conjugated bilirubin and a high alkaline phosphatase, an enzyme from the bile duct lining that rises when ducts are blocked, point to a problem after the liver has done its work. Liver cell enzymes are only mildly raised. Explained.
Each finding marks a point along the same pathway: the liver did its job, and the product could not leave.
Rival Process 1: Breakdown of Too Many Red Cells
If red blood cells were being destroyed rapidly, the liver would receive more bilirubin than it could conjugate, and unconjugated bilirubin would rise. The skin would turn yellow. But unconjugated bilirubin does not enter urine, so the urine would not darken, and plenty of bilirubin would reach the intestine, so the stools would be dark, not pale. This process explains the yellow skin but contradicts the urine and stool findings.
Rival Process 2: Inflammation of the Liver Itself
In hepatitis, damaged liver cells handle bilirubin poorly, and both forms can rise; urine can darken. But liver cell enzymes are usually very high, often much higher than alkaline phosphatase, and the pain pattern after fatty meals is unexplained. This process fits some findings but not the laboratory pattern or the history.
Ranking
Bile duct obstruction explains every finding. Red cell breakdown contradicts two findings. Liver inflammation fits poorly with the enzyme pattern and the history. Obstruction is therefore the leading process, with gallstones as the most likely cause given the history of pain after meals.
What Would Confirm It
An ultrasound of the abdomen can show gallstones and a widened bile duct above a blockage (Loscalzo et al., 2022). Further imaging of the ducts can locate the stone, and a procedure using a scope can often remove it.
Why Location in the Pathway Is the Key
Clinicians sometimes sort jaundice by where the problem lies relative to the liver. Before the liver, too much bilirubin arrives, as in rapid red cell breakdown. In the liver, the cells cannot process or secrete it, as in hepatitis. After the liver, bile cannot drain, as in a blocked duct. Each location produces a different combination of bilirubin type, urine color and stool color. The case's combination, conjugated bilirubin, dark urine and pale stools, points after the liver. Learning to read the pattern this way means the analysis does not depend on memorizing lists of causes; it depends on knowing where along the pathway each finding comes from, which works for cases the textbook never mentions.
Why the Process Matters
A blocked bile duct can become infected, causing cholangitis, or can trigger inflammation of the pancreas if the stone blocks the shared opening. Recognizing the process early leads to timely removal.
References
Lammert, F., Gurusamy, K., Ko, C. W., Miquel, J.-F., Méndez-Sánchez, N., Portincasa, P., van Erpecum, K. J., van Laarhoven, C. J., & Wang, D. Q.-H. (2016). Gallstones. Nature Reviews Disease Primers, 2, 16024. https://doi.org/10.1038/nrdp.2016.24
Loscalzo, J., Fauci, A. S., Kasper, D. L., Hauser, S. L., Longo, D. L., & Jameson, J. L. (Eds.). (2022). Harrison's principles of internal medicine (21st ed.). McGraw Hill.
Rogers, J. L. (Ed.). (2023). McCance & Huether's pathophysiology: The biologic basis for disease in adults and children (9th ed.). Elsevier.
HS200 Unit 5 instructions, in plain terms
Unit 5 typically supplies a case with findings and asks students to identify and defend the disease process that explains them, often ruling out alternatives. Analyses of three to five pages are common. Instructors look for normal physiology explained first, each finding tested against the proposed process and at least two plausible alternatives considered and ranked. Conclusions are usually framed as a process rather than a formal diagnosis. Many prompts reward reasoning that would work on unfamiliar cases rather than pattern matching. Laboratory findings should be interpreted by what they reveal about the process. Citing a review and the course textbook is commonly expected.
Inside the HS200 Unit 5 example
The analysis states the findings, then explains the bilirubin pathway from red cell breakdown to stool color. It proposes a blocked common bile duct and tests six findings one by one, from pain after meals to the enzyme pattern; the highlighted sentence summarizes the pattern. Two rival processes are tested and found to contradict or fit poorly. A ranking section states the conclusion. A section explains sorting jaundice as before, in or after the liver. Closing sections describe ultrasound and further imaging as confirmation and explain why a blocked duct risks infection and pancreatitis. The rivals are chosen because each explains part of the picture, which makes ruling them out instructive.
HS200 Unit 5 rubric: what earns full points
Case scenario analyses are generally graded on correct use of normal physiology, the rigor of testing findings against processes, treatment of alternatives, the soundness of the conclusion and clarity. Rigor often carries the most weight; graders reward analyses that test every finding rather than a few convenient ones. Alternatives earn credit when they are plausible and rejected for specific reasons. The conclusion should follow from the testing and be framed as a process. Physiology points depend on an accurate pathway. Clear organization by finding, accurate terminology and cited sources complete the score. Analyses that name the answer first and then list supporting facts tend to score lower. Reviewers frequently look at whether the laboratory pattern was used as evidence rather than simply repeated.
Common HS200 Unit 5 mistakes, and how to avoid them
The most frequent weakness is naming the condition at once and then listing only the findings that support it. Another is choosing rival processes that no one would seriously consider. Some students confuse conjugated and unconjugated bilirubin, which undermines the urine and stool reasoning. Others skip the laboratory pattern or misread which enzyme points to the bile ducts. Giving a formal diagnosis without explaining the process misses the purpose of the unit. If your case presents different findings, perhaps chest pain with fever or swelling in both legs, send the case, and we will reason from findings to process with ranked alternatives.
Get an HS200 Unit 5 example written to your instructions
Which findings does your Unit 5 case supply? Paste the scenario as your section wrote it, with the rubric and any required headings, and the analysis argues back from those findings to one process. It arrives within 24-48h. The first custom sample is free, and the case describes nobody real. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
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HS200 Unit 5 questions, answered
What if two processes could explain the findings?
Say so, and then rank them. A good analysis names the stronger explanation first and states which finding tips the balance, or which missing finding would. If the case genuinely supports two readings, the next move is naming the test that would separate them. Graders tend to reward that honesty over a conclusion forced to look certain.
Should the analysis include a diagnosis?
Usually as a conclusion about process rather than a formal diagnosis. The prompt in most HS200 sections asks which disease process would produce the findings, and the answer can name a likely condition while staying clear that confirming it would require testing. Framing the conclusion as the best-supported explanation keeps the analysis within the course's scope.
How many alternatives need to be ruled out?
Two is common, and the prompt may state a number. Choose alternatives that share the most visible finding, because ruling out something that looks nothing like the case proves little. For jaundice that means the other two routes to raised bilirubin. Each one needs a named finding it cannot account for; a sentence calling it less likely does not count.
Where can I find a free HS200 Unit 5 sample paper?
The complete Unit 5 case analysis is shown here, arguing that a gallstone in the common bile duct explains every finding in a jaundice case.
Why are the stools pale in bile duct obstruction?
Bilirubin cannot reach the intestine, so the bacteria there cannot convert it into the brown pigments that normally color stool.