Immune system modeling
Your body can make antibodies against a virus it has never seen. When you model matched and mismatched shapes, why does only the matched pair lock on and neutralize the ?
Students will model an - response to show how targets pathogens.
- • Model shows specific - matching.
- • Notes describe a faster secondary memory response.
- A key opens only one lock. What does that tell you about how an might recognize one specific germ?
- The first time you meet a new germ it takes days to fight off, but the second time is fast. What did your body keep from the first time?
- 1Review recognition and binding.
- 2Build a model pairing shapes to shapes.
- 3Simulate a first exposure and a memory response.
- 4Show how matched antibodies neutralize the .
- 5Record how the response speeds up on second exposure.
🛠 Get unstuck · pick your level
Lab day: Tier 1 is the whole class at the bench. No extension today.
🔑 Today's words · 5
Tap a word in the lesson for a plain meaning and one example. Recycled into next week's Do-Now.
Do the work · 80-minute blockfirst 5 min = hook▸
💡 Big idea: An binds only the whose shape it matches, so vaccines can pre-load memory cells with the exact shape of a , which is why one exposure to a gives lasting, specific protection.
- 0-10Quick review: recognition, binding, B cell role
- 10-22Build model: assign and shape cards; test matching
- 22-42First-exposure simulation: introduce , trace slow primary response, record timeline
- 42-58Second-exposure simulation: reintroduce , trace fast memory response, record timeline
- 58-70Draw comparison diagram: primary vs. secondary response with labeled timescales
- 70-80Submit comparison diagram and model notes
- • The adaptive immune system is essentially a molecular lock-and-key system operating at massive scale.
- • Today you will make that invisible process visible using a physical model.
- • Running the model through two exposures shows exactly why your second infection with the same is milder.
- • Your notebook record of both exposures is the artifact you will use in tomorrow's CER.
- • shape is complementary to a specific epitope; only matched pairs bind effectively.
- • On first exposure, the adaptive response is slow (days); memory B cells accelerate the response on re-exposure.
- • This lock-and-key specificity is the mechanism that vaccines exploit to pre-train memory cells.
Unit 3.2 Body Guards: Skin/accessory organs, lymphatic and immune systems, pathogens, immune cells, antigen response. · Immune system modeling
Day 3 of this lesson. Open this exact section in myPLTW (find it in Clever, Microsoft sign-in), then do the work below.
Do this: Complete any modeling or - activity check-in in Lesson 3.2 Body Guards on myPLTW that accompanies today's immune-response model build.
Mark the modeling task complete in myPLTW after submitting your - model diagram.
Immunity task is done; today the modeling task should show complete.
Note or screenshot of completion status for your tracker.
All PLTW activities are completed inside the PLTW course environment: this page only gives direction. Submit producibles on Schoology.
Check things off as you work, then submit. This tells Mr. Mendoza how you're doing so he can help the class. It does not replace turning in your producible on Schoology.
Use the code Mr. Mendoza gave you, not your name. Saved on this device.
Unit 3.2 Body Guards: Skin/accessory organs, lymphatic and immune systems, pathogens, immune cells, antigen response. · Immune system modeling
Complete any modeling or - activity check-in in Lesson 3.2 Body Guards on myPLTW that accompanies today's immune-response model build.
Immunity task is done; today the modeling task should show complete.
This is how Mr. Mendoza sees the class keeping pace with PLTW. Be honest, it only helps if it is accurate.
🎯 Students will model an - response to show how targets pathogens.
- Review recognition and binding.
- Build a model pairing shapes to shapes.
- Simulate a first exposure and a memory response.
- Show how matched antibodies neutralize the .
- Record how the response speeds up on second exposure.
Lab report: Comparison diagram of primary vs. secondary with labeled levels and timescales, plus model notes describing how matched antibodies neutralize the .
Turn it in on Schoology using the checklist just below. Upload by 11:29 PM for full credit.
| Task | Who |
|---|---|
| Review recognition and binding. | _______ |
| Build a model pairing shapes to shapes. | _______ |
| Simulate a first exposure and a memory response. | _______ |
| Show how matched antibodies neutralize the . | _______ |
| Record how the response speeds up on second exposure. | _______ |
Working solo? Put your own name in "Who" for every row.
- Model shows specific - matching.
- Notes describe a faster secondary memory response.
- 1Do thisStudents will model an antigen-antibody response to show how adaptive immunity targets pathogens.
- 2Use this resource
- 3Submit thisLab report: Comparison diagram of primary vs. secondary immune response with labeled antibody levels and timescales, plus model notes describing how matched antibodies neutralize the pathogen.
- 4Submit it here
- 1Open Clever.
- 2Microsoft (district) sign-in.
- 3Schoology and myPLTW are both in Clever.
Look for this assignment in Schoology: Human Anatomy & Physiology (Human Body Systems) › Unit 3.2 Body Guards: Skin/accessory organs, lymphatic and immune systems, pathogens, immune cells, antigen response. › Lab reportOpen Schoology
Learn it · deck, reading, and vocabulary▸
Tier 1 is the time-boxed teacher set for the block; Tier 2 adds scaffolded vocabulary, examples, and a reading routine; Tier 3 extends into careers and current biomedical applications.
Generated from this lesson's canonical data with a red-team citation check.
Students often think Students often think one can attack many different germs, like a general-purpose weapon.. The trap: That is the trap: each 's binding site is complementary to one specific 's epitope, so a matched pair binds and a mismatched pair does not. This lock-and-key specificity is not a limitation to work around; it is the exact reason a can pre-train memory cells for one disease.
Model notes: I matched antibody shapes to specific antigen shapes, like a lock and key. Only the complementary antibody bound the antigen; mismatched shapes did not stick. When an antibody bound the pathogen, it neutralized it (blocked it from infecting cells) and tagged it for destruction.
Primary vs secondary response: On the first exposure, antibody levels rose slowly and stayed low. On the second exposure, memory B cells made antibodies rise faster and reach a much higher level. That speed-up is why the second exposure rarely makes you sick and is exactly what a vaccine pre-trains.
Also due today: Submit your comparison diagram and notes to the Schoology assignment for HBS Immune Day 3 (Model Lab).
- 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, then give one example from what you actually did in Immune system modeling. 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 3: Adventure Awaits. 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 3 notebook: Adventure Awaits 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.
Check yourself · commit, then reveal▸
In your model, an antibody's shape matches antigen A but not antigen B. Both antigens are present. Predict what binds, and explain why that specificity is what makes vaccines possible.
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.
Go further and get help▸
Finish the checklist before you handle any material.
- • No chemical hazards in this activity; standard classroom behavior expectations apply.
- • Handle all shared materials with clean hands; use hand sanitizer at the start and end of class.
- • Return all model components to the designated container at the end of the period.
- 1Frame the guiding question and name your independent and dependent variables.
- 2Plan a method that would actually answer it, then get the plan checked before you start.
- 3Collect data carefully and record exactly what you observe before you interpret it.
- 4Build a tentative argument on a whiteboard: claim, evidence, reasoning.
- 5Argumentation session: present your board, question another group, and revise your claim.
- 6Write the final CER with your strongest evidence and one named limitation of the method.
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.
Run your - model through a first exposure and a second exposure, recording how memory speeds the response.
MedlinePlus: Immune System and DisordersThen submit your Lab report on Schoology.
Class still runs. Complete the online activity above (it's self-guided). Need the concept taught without a teacher? Use this authoritative explainer:
MedlinePlus: Immune System and DisordersYou've passed Unit 2, so the optional extra-credit track is open. Complete reserved-unit work from home (virtual labs included) for extra credit, submitted on Schoology.
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.
- SubmittedTurned in the right way (Schoology for routine work) and confirmed.
- Error analysis and method · counts doubleName a specific limit of the method and how it moved your result, and compare what you predicted to what happened. "Human error" does not count; say what about the procedure or instrument caused it.