Animal research ethics debate
Open your materials, follow the steps, then turn in your work.
Debate the ethics of using model organisms like C. elegans in human-health research.
1. Open your materials
2. Start the work
Read a short prompt on why scientists use model organisms.
Show all 5 required steps
- Read a short prompt on why scientists use model organisms.
- Form groups representing researchers, ethicists, and patient advocates.
- List two justifications and two concerns about animal models.
- Exchange one rebuttal with an opposing group.
- Write your personal stance with one supporting reason.
Lost your place? Lost your place? Find the model-organism prompt you read at the start, then check which of the three roles (researcher, ethicist, or patient advocate) your group took, and make sure you have your two justifications and two concerns written before you trade a rebuttal.
Check your work before submitting
- Each student articulates a stance backed by a reason.
- Groups surface at least one real ethical tradeoff.
3. Turn in your work
DueCheck Schoology- Hand in
- Written personal stance on using C. elegans in research, citing one justification and acknowledging one genuine ethical concern.
How to submit and name your file
Use the submission route shown on today's today's page.
In Schoology, open your course and the assignment for this lesson. Attach your file, select Submit, and check that it appears in the submission.
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Check the section number beside Human Anatomy and Physiology in Schoology.
Assignment: Wk12 Exit ticket: Animal research ethics debate
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How this lesson connects
Keep using what you learned last class: A glucose graph reveals whether homeostasis is intact because specific values over time show the feedback loop correcting the deviation, so that a curve that never returns to baseline points to exactly where the loop failed. Today: Scientists use model organisms because they share conserved biology with humans, so their use always carries an ethical cost that must be weighed against the knowledge gained.
Unit 2 guide: what to keep and use nextOptional: listen or watch a unit review▸
Need help? Warm-up, timing, and directions▸
💡 Big idea: Scientists use model organisms because they share conserved biology with humans, so their use always carries an ethical cost that must be weighed against the knowledge gained.
- 0-8Read the model-organism prompt; assign stakeholder roles to groups
- 8-22Group prep: list 2 justifications and 2 concerns from your stakeholder view
- 22-40Debate round 1: each group states its strongest justification
- 40-55Rebuttal round: each group responds to one opposing claim
- 55-70Individual writing: personal stance with one supporting reason
- 70-80Pair-share stances and submit exit ticket
- • A tiny transparent worm has helped scientists win multiple Nobel Prizes in medicine.
- • Today you will decide whether using that worm, and others like it, is ethically justified.
- • Bioethics debate sharpens your ability to evaluate evidence and communicate reasoning clearly.
- • You will leave with a written, reasoned stance you can defend.
- • Model organisms like C. elegans are used because they share conserved biological pathways with humans.
- • Research ethics weighs scientific benefit against potential harm to living subjects.
- • Understanding why we use model organisms connects to Microbiology and Evaluate Body Systems WebXam domains.
PLTW connection and today's work
Open Problem 2.3.1 Toxic Relationships (Lesson 2.3 Challenge Accepted) in myPLTW and complete any activity or reflection prompt assigned for today's model-organism ethics debate.
Today's stopping point: You finished the endocrine week; today begins the research-design phase bridging Lessons 2.2 and 2.3, and the task should be checked off.
PLTW activity titles identify the course connection. If your account will not open, use the posted materials for today and tell Mr. Mendoza. Do not mark an online activity complete unless you completed it.
Course connection
- Problem 2.3.1 Toxic Relationships
Use the turn-in directions at the top of this page. Do not create a second submission unless your teacher asks for one.
Show another explanation or a smaller first step
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Lesson resources: reading, slides, and vocabulary▸
The deck carries the prior idea forward, lets you inspect an analogy, maps the rule to biology, and ends with the same evidence decision and exit ticket used on this page.
Generated from this lesson's canonical data with a red-team citation check.
A glucose graph reveals whether is intact because specific values over time show the correcting the deviation, so that a curve that never returns to baseline points to exactly where the loop failed.
Scientists use model organisms because they share conserved biology with humans, so their use always carries an ethical cost that must be weighed against the knowledge gained.
A review board sorts scientific evidence, stakeholder needs, possible benefits, possible burdens, and uncertainty before choosing a policy.
- Which statements are scientific evidence?
- Which statements express a value or priority?
- Who receives the benefit and who carries the burden?
Use science to estimate consequences, then state the value judgment and tradeoff that determine the decision.
A review-board model organizes reasoning but does not make one ethical principle automatically outweigh every other principle.
- • Evidence cards map to source-backed findings.
- • Stakeholder cards map to affected people and priorities.
- • The recommendation maps to an explicit tradeoff with a named uncertainty.
Driving question: Should a lab be allowed to use thousands of C. elegans worms to study a disease pathway that also exists in humans?
What you already know: A glucose graph reveals whether is intact because specific values over time show the correcting the deviation, so that a curve that never returns to baseline points to exactly where the loop failed.
New idea: Scientists use model organisms because they share conserved biology with humans, so their use always carries an ethical cost that must be weighed against the knowledge gained.
Visual or model: F1. F1. A lesson illustration or teaching diagram for Animal research ethics debate. Use it with E1-E3; it is a model or context image, not experimental or patient data. What to notice: Trace the labeled structure, movement, or system relationship that connects form to function.
- Observe or measure the relevant feature in animal research ethics debate.
- Organize the observation with a stable evidence ID.
- Apply this rule: Use science to estimate consequences, then state the value judgment and tradeoff that determine the decision.
- Choose the option the evidence supports and state the limit of the conclusion.
Real biomedical example: Should a lab be allowed to use thousands of C. elegans worms to study a disease pathway that also exists in humans?
What the evidence supports: E1-E3 and F1 support the daily take-home when the response meets the stated success criteria.
What it cannot prove: The package does not support claims beyond this lesson's or any real patient diagnosis.
- • : A species, such as zebrafish or mouse, studied because its biology is similar enough to ours to teach us about human development and disease.
- • C. elegans: Use the lesson context and glossary entry to explain C. elegans in your own words.
- • : A that measures the presence, amount, or activity of a target substance such as a , , or chemical in a sample.
- • literature: The body of published research articles and reports on a topic that scientists read to learn what is already known before doing new work.
- • variable: Any factor in an experiment that can change or be changed, including what you test, what you measure, and what you hold steady.
- • control: The comparison condition that isolates the effect of the variable being tested by keeping everything else the same.
- • : The number of subjects or observations in a study; larger samples give more reliable results and reduce the role of chance.
Use it now: Choose one decision option. Cite E1 and E3, then explain how the rule connects the evidence to your choice.
Go further, optional: The source links below are optional enrichment. Every fact required for today's local evidence decision appears in this lesson package.
A defensible biomedical decision separates scientific evidence from value judgments, identifies who may benefit or be burdened, and states the uncertainty and tradeoffs that remain.
Limit: Scientific evidence can inform the options and likely consequences, but it cannot choose a single value-neutral answer.
Use science to estimate consequences, then state the value judgment and tradeoff that determine the decision.
Limit: A review-board model organizes reasoning but does not make one ethical principle automatically outweigh every other principle.
Each student articulates a stance backed by a reason.
Limit: E3 defines the classroom product or success criterion. It is not independent scientific evidence and cannot justify a clinical or causal claim.
PLTW-HAP-2027-04-06 · Simulated classroom evidence scenario
Your role: anatomy and physiology consultant
Decision: Your team must decide what the evidence from animal research ethics debate supports before submitting the exit response named on today's page.
- • Wait for a record of whether past worm findings like this one ever became a real human treatment.
- • Allow the worm study only after weighing the knowledge gained against the ethical cost of the animals.
- • Ban the study outright, because using living animals for research is wrong no matter what the science gains.
Response: State one choice, cite at least two evidence IDs, explain the rule that connects them, and add one limitation. Submit it as the exit response.
Claim ceiling: Today's evidence supports a classroom claim about animal research ethics debate. It cannot prove causation, diagnose a real patient, or justify action outside this room.
Reason for review: Your team must decide what the evidence from animal research ethics debate supports before submitting the exit response named on today's page.
Context: Biomedical progress rests on model organisms, so scientists must weigh the good the research can do against the cost to the living things used to get it.
- • T1: Read a short prompt on why scientists use model organisms.
- • T2: Form groups representing researchers, ethicists, and patient advocates.
- • T3: List two justifications and two concerns about animal models.
- • T4: Exchange one rebuttal with an opposing group.
- • T5: Write your personal stance with one supporting reason.
- • E1: A defensible biomedical decision separates scientific evidence from value judgments, identifies who may benefit or be burdened, and states the uncertainty and tradeoffs that remain.
- • E2: Use science to estimate consequences, then state the value judgment and tradeoff that determine the decision.
- • E3: Each student articulates a stance backed by a reason.
Measurements: No patient measurement is supplied unless it appears explicitly in E1-E3 or F1. Do not invent a value.
Figure finding: Teaching diagram for Animal research ethics debate. Trace the labeled structure, movement, or system relationship that connects form to function. This is a teaching model, not patient or experimental data.
Uncertainty: This is a composite classroom scenario. Missing history, measurements, or confirmation tests remain unknown and limit the conclusion.
- • The solution must address the stated need in animal research ethics debate.
- • The decision must be supported by E1-E3.
- • The final product must make the success criteria visible.
- • Complete the work inside the 80-minute block.
- • Use only supplied or teacher-approved materials and evidence.
- • Do not trade , accessibility, or privacy for speed.
- • and evidence quality: must pass before scoring other criteria.
- • User need and effectiveness: highest scored criterion.
- • Time, cost, and ease of use: compare only after and effectiveness pass.
Test evidence: For each option, record the E1-E3 result that supports or fails each criterion. Do not assign a score without a named observation.
- Version or option tested
- Criterion met or missed
- Evidence ID and result
- Revision made
- Reason for the revision
- Need and user
- Criteria and constraints
- Chosen option and evidence
- Test result
- Revision and reason
Students often think Students often think research ethics means "animal testing is always wrong" or "science can do whatever it wants.". The trap: Both extremes skip the actual work. Ethics is not a yes-or-no switch; it is a weighing of benefit against harm, which is exactly why review boards exist and why the same study can be approved for worms but not for dogs.
Parallel scenario (not today's prompt): A lab wants to use zebrafish embryos to screen a new heart drug for toxicity before any human volunteers take it. Should that be allowed?\n\nClaim: I support the careful use of zebrafish embryos to screen a new drug for toxicity before human testing begins.\n\nEvidence (one justification): Zebrafish embryos are transparent and develop outside the mother, so scientists can watch the heart and other organs form in real time and see harmful effects early. Zebrafish also share many of the same organ systems and genes as humans, and running an early toxicity check in embryos flags dangerous compounds before they ever reach a human volunteer or a larger, more complex research animal.\n\nReasoning: Because zebrafish biology overlaps with human biology, a toxic effect seen in the embryo is a meaningful warning sign, and catching it early protects both future patients and other animals from unnecessary harm. That link between the model and the human question is what makes the test worth doing.\n\nGenuine ethical concern I acknowledge: Zebrafish embryos are still developing living organisms, and a result in a fish does not always predict what happens in a person, so a drug could look safe in the embryo and still harm humans, or look harmful and be dropped for the wrong reason. Because of that, I think embryo screening should follow clear welfare limits, use only as many embryos as the question requires, and be reported honestly about what the model can and cannot show.
This model shows the level of evidence and organization needed to complete: A written personal stance on using zebrafish embryos to screen a new drug for toxicity that cites one justification and acknowledges one genuine ethical concern.
- Name the prompt or task.
- Answer it directly with the key evidence.
- Check that the response matches the requested format.
Keep the structure. Replace the question, facts, measurements, and evidence. Then recheck units, vocabulary, and whether the conclusion goes beyond the evidence.
Also due today: Submit your exit-ticket on Schoology.
- CER:
- Claim, Evidence, Reasoning: make a claim, back it with evidence, explain your reasoning.
- SOP:
- Standard Operating Procedure, the exact steps to follow (especially in a lab).
- Tracker:
- Your PLTW progress log where you record completed evidence.
- myPLTW:
- The PLTW course site where you do the online activities. Find it in Clever with your Microsoft sign-in, right next to Schoology.
Tap the speaker to hear a term. Add two of these to your notebook glossary with a definition and an example in your own words.
Pick just 2 or 3 words from today and make them yours: write what each one means in your own words, name the context clue or evidence that helped, then give one example from what you actually did in Animal research ethics debate. Try your own words first; the glossary is there if you get stuck. This is voluntary and counts as extra credit, so keep it short.
Saved on this device. Show Mr. Mendoza or add these to your notebook glossary to claim the extra credit.
Hand-picked readings, videos, and interactives for this lesson, all free and from authoritative open organizations (NIH, CDC, OpenStax, Khan Academy, PhET, HHMI, and more).
A fillable, Cornell-style notebook for Unit 2: Research Ready. Type your notes, cues, and summaries right in the PDF, or print it and write by hand. Each lesson page has a cue column, a notes column, and a summary box, plus dated lab-record pages you can turn in.
HBS Unit 2 notebook: Research Ready Fillable PDFCornell notes + lab recordsOpenVetted readings and references for this unit. Use them to prepare, to catch up if you were absent, or to go deeper on today's target.
This site may ask you to verify you are human. If it blocks you on a school device, ask for the class copy.
Practice: try a question, then check your answer▸
Claim ceiling for this check: Today's evidence supports a classroom claim about animal research ethics debate. It cannot prove causation, diagnose a real patient, or justify action outside this room.
Give one scientific reason C. elegans is a useful model for human biology, and one ethical concern that using it still raises.
Write an answer and pick a confidence to unlock the key.
Fast retrieval with instant answers, not the commit-then-reveal check above. Try each from memory first: write what you remember about the earlier units, then check yourself here.
Missed class or ready for more?▸
What today's skills lead to. These are real health-science careers this course builds toward. Tap one to see, on the US Department of Labor's O*NET site, what the job actually involves, what it pays, and how fast it is growing.
Why zebrafish and mice model human development, and the Atit lab's work.
Goes with: Why zebrafish and mice: animal models and the Atit lab
Use to see how IRF6's 3D shape lets it do its job.
Goes with: AlphaFold and UniProt: structure tells function
Debate whether the simplicity of C. elegans justifies its use over more complex animals; log two points per side.
Use the submission route shown on today's today's page.
Class still runs. Complete the online activity above (it's self-guided). Need the concept taught without a teacher? Use this authoritative explainer:
Khan Academy: The science of biology (experimental design)You've passed Unit 2, so the optional extra-credit track is open. Complete reserved-unit work from home, including virtual labs, for extra credit. Each item shows its correct submission route.
Open the extra-credit track- CompleteEvery required part of the artifact is present, nothing left blank.
- AccurateThe science and the data are correct and match the evidence.
- Scientific reasoningYou explain your claim with evidence and reasoning (CER), not just an answer.
- Professional communicationClear, organized, labeled, and written the way a clinician or scientist would.
- SubmittedGo to Schoology to turn this in. Submit one PDF. Put your first and last name in the document header. Name the file: FirstName LastName - Assignment Title - YYYY-MM-DD.pdf. If you cannot get in, see Mr. Mendoza. Do not skip the work.
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