Immune system modeling
Safety gate · before any work
- 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.
Do now
Students will model an antigen-antibody response to show how adaptive immunity targets pathogens.
- Hand in
- Comparison diagram of primary vs. secondary immune response with labeled antibody levels and timescales, plus model notes describing how matched antibodies neutralize the pathogen.
- Where
- Turn this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not.
You get two school days for every day you were absent, so this deadline moves with you.
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.
What did this day actually feel like?
Immune system modeling
LAB The lab that moved. Comparing the primary and secondary immune response, with the timing and magnitude difference drawn out.
Seeing the two curves next to each other explains vaccination in one image. The second response is faster and much bigger, and that gap is the entire point.
Turned in: comparison diagram → Lab Reports folder
Fiction. There is no such student. The lessons, labs and dates are the real planned course; the student, the classmates and the conversations are invented.
The same day, drawn.
The lab that moved. Comparing the primary and secondary immune response, with the timing and magnitude difference drawn out.
Fiction. There is no such student. The lessons, labs and dates are the real planned course; the student, the classmates and the conversations are invented.
🛠 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.
The official PLTW activity stays inside myPLTW. If myPLTW will not open, use F1 and E1-E3 on this page to complete today's local evidence decision, then make up the official activity when access returns. Turn this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not.
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 through the submission route shown below.
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 this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not. Use the checklist just below and upload by 11:29 PM for full credit. Absent with an excused absence? You get two school days for every day you were absent, so this deadline moves with you.
| 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 the drop folder.
- 2Sign in with your district Microsoft account, not a personal one.
- 3Upload the file, named Lastname_Firstname__Assignment Title.
- 4Your own upload panel says Uploaded with a green check: that is your receipt.
Turn this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not. 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 the drop folder
Learn it · deck, reading, 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.
works only above a threshold percentage, so one person opting out lowers the wall for everyone, which is why an individual choice collides with collective .
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.
A bridge prototype is tested against a load limit, cost limit, and user need before revision.
- Which requirement is a criterion?
- Which limit is a constraint?
- What test result should trigger a redesign?
A design improves when evidence is compared with explicit criteria and constraints.
Biomedical designs also require , ethics, and biological validation beyond a physical prototype test.
- • Bridge requirements map to design criteria.
- • Load results map to E1-E3.
- • Revision maps to the next evidence-based iteration.
Driving question: 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 ?
What you already know: works only above a threshold percentage, so one person opting out lowers the wall for everyone, which is why an individual choice collides with collective .
New 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.
Visual or model: F1. F1. A lesson illustration or teaching diagram for Immune system modeling. 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 Immune system modeling.
- Organize the observation with a stable evidence ID.
- Apply this rule: A design improves when evidence is compared with explicit criteria and constraints.
- Choose the option the evidence supports and state the limit of the conclusion.
Real biomedical example: 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 ?
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.
- • skin: The body's largest organ, a layered barrier that protects internal tissues, regulates temperature, and senses touch, pressure, and pain.
- • : A clear fluid that drains from body tissues into lymphatic vessels, carrying white blood cells and helping the body fight infection.
- • : A Y-shaped made by the immune system that binds to a specific foreign target, marking it for destruction or blocking its effect.
- • : A molecule, often on a germ's surface, that the immune system recognizes as foreign and responds to by making matching antibodies.
- • : A microorganism such as a bacterium, virus, fungus, or parasite that can cause disease in its host.
- • : A preparation that trains the immune system to recognize a specific , building protection so the body can fight it off faster later.
- • : The body's first, fast, general line of defense present from birth, including skin, mucus, and cells that attack any invader without prior exposure.
- • adaptive: Able to adjust to changing conditions, like the body shifting blood flow during exercise or the immune system tailoring a defense to a specific germ.
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.
shape is complementary to a specific epitope; only matched pairs bind effectively.
Limit: E1 supplies context or an observation; it does not by itself establish the explanation.
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.
Limit: E2 is a teaching statement or comparison and must be checked against the task evidence.
Model shows specific - matching.
Limit: E3 supports only the result or product criterion named here; it cannot justify a broader clinical or causal claim.
PLTW-HAP-2027-05-03 · Simulated classroom evidence scenario
Your role: anatomy and physiology consultant
Decision: Your team must decide what the evidence from Immune system modeling supports before submitting the lab report named on the lesson page.
- • Keep the current design.
- • Revise the feature that misses a criterion.
- • Run one more fair test before choosing.
Response: State one choice, cite at least two evidence IDs, explain the rule that connects them, and add one limitation. Submit it as the lab report.
Claim ceiling: The supplied lesson evidence can support an observation, pattern, classroom mechanism, or next-step decision about Immune system modeling. It cannot by itself prove causation, establish a real clinical diagnosis, or justify action outside this classroom task.
Reason for review: Your team must decide what the evidence from Immune system modeling supports before submitting the lab report named on the lesson page.
Context: An works like a lock shaped for one key: its binding site physically matches one 's shape, so recognition is a matter of fit, and once memory cells hold that matching shape, the second response is fast enough to stop you from getting sick.
- • T1: Review recognition and binding.
- • T2: Build a model pairing shapes to shapes.
- • T3: Simulate a first exposure and a memory response.
- • T4: Show how matched antibodies neutralize the .
- • T5: Record how the response speeds up on second exposure.
- • E1: shape is complementary to a specific epitope; only matched pairs bind effectively.
- • E2: 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.
- • E3: Model shows specific - matching.
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 Immune system modeling. 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.
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.
This model shows the level of evidence and organization needed to complete: Completes the antigen-antibody modeling target: a labeled comparison of primary and secondary responses with antibody levels and timescales, plus notes on how matched antibodies neutralize a pathogen.
- State the question and method.
- Present the observations and data with units.
- Explain the result, limitations, and next investigation.
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 comparison diagram and notes on the class site, or hand it to Mr. Mendoza in class.
- 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 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▸
Claim ceiling for this check: The supplied lesson evidence can support an observation, pattern, classroom mechanism, or next-step decision about Immune system modeling. It cannot by itself prove causation, establish a real clinical diagnosis, or justify action outside this classroom task.
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▸
I can name the procedure's purpose and the evidence I will record. I can identify each named hazard and the control that reduces it: No chemical hazards in this activity; standard classroom behavior expectations apply. My data table is ready before materials are handled.
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.
- 1Before materials are handled, identify the purpose, variables or comparison, controls, measurement units, and stop-work condition.
- 2Review antigen recognition and antibody binding.
- 3Build a model pairing antibody shapes to antigen shapes.
- 4Simulate a first exposure and a memory response.
- 5Show how matched antibodies neutralize the pathogen.
- 6Record how the response speeds up on second exposure.
- 7Record each result in the prepared table before interpreting it. Mark missing, repeated, or invalid results truthfully.
- 8Complete the named cleanup and waste route, remove PPE safely, wash hands when required, and confirm the station is ready for the next group.
| Trial or sample ID | Independent condition | Measured result with units | Observation before interpretation | Quality-control note |
|---|---|---|---|---|
Before the procedure, predict the result and cite the rule behind the prediction.
After the procedure, compare the result with the prediction and name one limitation or source of uncertainty.
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. Turn this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not.
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, 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.
- SubmittedTurned in the right way, on the class site or handed to Mr. Mendoza in class, and confirmed. Not in Schoology: that is where the report-card grade appears later.
- 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.