Drug effects on signaling
Do now
Analyze your reaction-time data and explain how drugs alter neural signaling with a CER.
- Hand in
- Bar graph of baseline vs distraction average reaction time (labeled, with units) plus a CER explaining how a depressant or stimulant would alter the pattern via synaptic mechanism.
- 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 distraction condition slowed your reaction by a measured number of milliseconds; using that pattern as evidence, how would a depressant like alcohol be expected to shift the same result, and in which direction?
Analyze your reaction-time data and explain how drugs alter neural signaling with a CER.
- • You can graph and interpret reaction-time differences.
- • You can explain drug effects on signaling with a CER.
- From yesterday's lab, was your distraction condition faster or slower than baseline?
- Would a depressant push your in the same direction as the distraction, or the opposite direction?
- 1Graph your reaction times by condition.
- 2Describe how the distraction or a drug would shift the results.
- 3Complete the PLTW online analysis on drugs and synaptic signaling.
- 4Write a CER claiming how a depressant or stimulant would change , using your data pattern as evidence.
- 5Submit your labeled graph and signaling CER.
What did this day actually feel like?
Drug effects on signaling
Bar graph of baseline against distraction, with error noted, then a CER about what it means for signaling.
The limitation I had to write is that we tested distraction, not medication, so my conclusion about drugs is an extension of the data rather than something the data shows. That distinction is the thing this class keeps drilling.
AT HOME, THE WEEKEND BEFORE MON MAR 22 Submit reflex evidence Reflex arc diagram, reaction time table, comparison graph, CER.
Turned in: reflex packet → recorded in Class Records
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.
Bar graph of baseline against distraction, with error noted, then a CER about what it means for signaling.
ME
I did not feel any slower. The stopwatch says I was.
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
🔑 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: Drugs shift by changing availability or sensitivity at synapses, so your measured distraction delay works as evidence to predict a depressant's or stimulant's effect and its direction.
- 0-8Intro: how depressants and stimulants alter synaptic
- 8-25Build bar graph: baseline vs distraction average
- 25-45PLTW online analysis: drugs and synaptic signaling
- 45-55Describe observed trend and predict direction of drug effect
- 55-75Write CER: depressant or stimulant effect on , mechanism at
- 75-80Submit labeled graph and CER
- • Your is now a scientific instrument. Today you use it to reason about drug effects on the nervous system.
- • Drugs work at the . They either make faster or slower. Your distraction condition shows what slower looks like in your data.
- • Your graph goes condition on the X-axis, average on the Y-axis. Error bars if you have them. Title, labeled axes, units.
- • The CER picks one drug class, claims the direction of its effect on your reaction-time pattern, and explains the mechanism at the level.
- • Depressants (alcohol, antihistamines, opioids, benzodiazepines) slow synaptic by enhancing or blocking excitation, increasing .
- • Stimulants (caffeine, amphetamines) accelerate synaptic by increasing excitatory release or blocking reuptake, decreasing .
- • A data-based CER about drug effects must use the observed distraction-condition pattern as the analogy: if distraction slowed reaction by X ms, a depressant would be expected to slow it further and in a similar way.
Unit 2.1 Reflexes: Drug impacts on neuron signaling, reflex and reaction time, patient diagnosis challenge. · Drug effects on signaling
Day 4 of this lesson. Open this exact section in myPLTW (find it in Clever, Microsoft sign-in), then do the work below.
Do this: Complete the drug-effects and neural-signaling analysis task in Lesson 2.1 Getting Nervous on myPLTW; finish all screens before writing your CER about drug effects.
Mark the drug-effects task complete after submitting your CER.
Lab task is done; today the analysis task should show complete and your CER should be submitted.
myPLTW completion status plus submitted CER.
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 2.1 Reflexes: Drug impacts on neuron signaling, reflex and reaction time, patient diagnosis challenge. · Drug effects on signaling
Complete the drug-effects and neural-signaling analysis task in Lesson 2.1 Getting Nervous on myPLTW; finish all screens before writing your CER about drug effects.
Lab task is done; today the analysis task should show complete and your CER should be submitted.
This is how Mr. Mendoza sees the class keeping pace with PLTW. Be honest, it only helps if it is accurate.
🎯 Analyze your reaction-time data and explain how drugs alter neural signaling with a CER.
- Graph your reaction times by condition.
- Describe how the distraction or a drug would shift the results.
- Complete the PLTW online analysis on drugs and synaptic signaling.
- Write a CER claiming how a depressant or stimulant would change , using your data pattern as evidence.
- Submit your labeled graph and signaling CER.
CER: Bar graph of baseline vs distraction average (labeled, with units) plus a CER explaining how a depressant or stimulant would alter the pattern via synaptic mechanism.
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 |
|---|---|
| Graph your reaction times by condition. | _______ |
| Describe how the distraction or a drug would shift the results. | _______ |
| Complete the PLTW online analysis on drugs and synaptic signaling. | _______ |
| Write a CER claiming how a depressant or stimulant would change , using your data pattern as evidence. | _______ |
| Submit your labeled graph and signaling CER. | _______ |
Working solo? Put your own name in "Who" for every row.
- You can graph and interpret reaction-time differences.
- You can explain drug effects on signaling with a CER.
- 1Do thisAnalyze your reaction-time data and explain how drugs alter neural signaling with a CER.
- 2Use this resource
- 3Submit thisCER: Bar graph of baseline vs distraction average reaction time (labeled, with units) plus a CER explaining how a depressant or stimulant would alter the pattern via synaptic mechanism.
- 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 2.1 Reflexes: Drug impacts on neuron signaling, reflex and reaction time, patient diagnosis challenge. › CEROpen 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.
is a single measurable variable that reflects the whole pathway from to movement, so a consistent multi-trial protocol lets you prove that adding a distraction adds real, countable delay.
Drugs shift by changing availability or sensitivity at synapses, so your measured distraction delay works as evidence to predict a depressant's or stimulant's effect and its direction.
A smoke alarm detects signs of fire but can also react to burnt toast.
- What does the alarm detect?
- What creates a false alarm?
- What evidence is needed before declaring a fire?
A screening signal changes what to investigate next; it does not automatically prove the cause.
Biomedical tests have measured performance and biological sampling limits that a household alarm does not capture.
- • Alarm signal maps to a test result.
- • Burnt toast maps to a .
- • Inspection maps to confirmation or the next test.
Driving question: Your distraction condition slowed your reaction by a measured number of milliseconds; using that pattern as evidence, how would a depressant like alcohol be expected to shift the same result, and in which direction?
What you already know: is a single measurable variable that reflects the whole pathway from to movement, so a consistent multi-trial protocol lets you prove that adding a distraction adds real, countable delay.
New idea: Drugs shift by changing availability or sensitivity at synapses, so your measured distraction delay works as evidence to predict a depressant's or stimulant's effect and its direction.
Visual or model: F1. F1. A lesson illustration or teaching diagram for Drug effects on signaling. 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 Drug effects on signaling.
- Organize the observation with a stable evidence ID.
- Apply this rule: A screening signal changes what to investigate next; it does not automatically prove the cause.
- Choose the option the evidence supports and state the limit of the conclusion.
Real biomedical example: Your distraction condition slowed your reaction by a measured number of milliseconds; using that pattern as evidence, how would a depressant like alcohol be expected to shift the same result, and in which direction?
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 fast, automatic response to a that travels through the spinal cord, protecting the body before the brain consciously decides to act.
- • : The short interval between when a appears and when a person responds to it, reflecting how fast the nervous system processes signals.
- • : Any change in the environment, such as light, sound, or temperature, that a living thing can detect and respond to.
- • response: The body's reaction to a detected , carried out by muscles or glands to adjust to a change in the internal or external environment.
- • : A fatty insulating layer wrapped around nerve fibers that speeds up the electrical signals traveling along them.
- • : A , often on the cell surface, that binds a specific signal molecule and triggers a response inside the cell.
- • : The muscle, gland, or other part that carries out the body's response to a signal, acting on the command sent from a control center.
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.
Depressants (alcohol, antihistamines, opioids, benzodiazepines) slow synaptic by enhancing or blocking excitation, increasing .
Limit: E1 supplies context or an observation; it does not by itself establish the explanation.
Drugs shift by changing availability or sensitivity at synapses, so your measured distraction delay works as evidence to predict a depressant's or stimulant's effect and its direction.
Limit: E2 is a teaching statement or comparison and must be checked against the task evidence.
You can graph and interpret reaction-time differences.
Limit: E3 supports only the result or product criterion named here; it cannot justify a broader clinical or causal claim.
PLTW-HAP-2027-03-18 · Simulated classroom evidence scenario
Your role: anatomy and physiology consultant
Decision: Your team must decide what the evidence from Drug effects on signaling supports before submitting the claim-evidence-reasoning response named on the lesson page.
- • Select the option best supported by E1-E3.
- • Select a reasonable alternative and name the evidence it would require.
- • Delay the claim because the evidence does not distinguish the options.
Response: State one choice, cite at least two evidence IDs, explain the rule that connects them, and add one limitation. Submit it as the claim-evidence-reasoning response.
Claim ceiling: The supplied lesson evidence can support an observation, pattern, classroom mechanism, or next-step decision about Drug effects on signaling. 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 Drug effects on signaling supports before submitting the claim-evidence-reasoning response named on the lesson page.
Context: Drugs change by shifting availability or sensitivity at the , so your own distraction data becomes an analogy you can use to predict a depressant's or stimulant's effect.
- • T1: Graph your reaction times by condition.
- • T2: Describe how the distraction or a drug would shift the results.
- • T3: Complete the PLTW online analysis on drugs and synaptic signaling.
- • T4: Write a CER claiming how a depressant or stimulant would change , using your data pattern as evidence.
- • T5: Submit your labeled graph and signaling CER.
- • E1: Depressants (alcohol, antihistamines, opioids, benzodiazepines) slow synaptic by enhancing or blocking excitation, increasing .
- • E2: Drugs shift by changing availability or sensitivity at synapses, so your measured distraction delay works as evidence to predict a depressant's or stimulant's effect and its direction.
- • E3: You can graph and interpret reaction-time differences.
Measurements: Use only the measurements, units, graph, or counts supplied in today's task. No additional patient measurement is implied.
Figure finding: Teaching diagram for Drug effects on signaling. 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.
Rate or percent = part / comparison total x 100%. Percent change = (new - comparison) / comparison x 100%.
If 18 of 60 records meet a condition, the frequency is 18 / 60 x 100% = 30%.
Name the comparison total. A percent describes the supplied group and does not automatically predict an individual's outcome.
Use today's supplied counts to calculate one rate, risk, frequency, or percent change. Show the denominator and interpretation.
Students often think Students think all drugs 'mess you up' and therefore assume every drug slows .. The trap: It is a trap because depressants and stimulants act in opposite directions at the . Depressants enhance or block excitation and slow (longer ); stimulants boost excitatory release or block reuptake and speed transmission (shorter reaction time). Lumping them together predicts the wrong direction for half of them.
Bar graph: two bars, warm-hand condition 195 ms and cold-hand condition 248 ms, y-axis labeled "Reflex latency (ms)," x-axis labeled "Hand temperature."\n\nClaim: Cooling the skin and nerves of the hand would lengthen the withdrawal-reflex latency compared to a warm hand.\n\nEvidence: In our data, the average time from touch to finger pull-back rose from 195 ms with a warm hand to 248 ms with a cold hand, a slowdown of about 53 ms.\n\nReasoning: A reflex signal has to travel along sensory and motor neurons and cross synapses, and anything that slows that pathway lengthens the measured latency. Cooling does this physically, because lower temperature slows the ion movement and membrane processes that drive each action potential, so the impulse travels more slowly down the axon. That is why cooling by a few degrees added about 53 ms to the reflex, the same direction that any change slowing conduction would push. Warming the pathway would do the opposite, speeding conduction and shortening the latency back toward or below the warm baseline.
This model shows the level of evidence and organization needed to complete: A labeled bar graph comparing two average nerve-signal timing conditions with units, plus a Claim-Evidence-Reasoning paragraph explaining how a physical change to the signaling pathway shifts the pattern through a conduction mechanism.
- Write one defensible claim.
- Choose specific evidence that supports the claim.
- Explain the scientific rule that connects the evidence to the claim.
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 graph and CER as a single combined document.
- 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 Drug effects on signaling. 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.
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 Drug effects on signaling. It cannot by itself prove causation, establish a real clinical diagnosis, or justify action outside this classroom task.
Your distraction condition raised reaction time by 60 ms. Using that as your analogy, predict the direction a stimulant like caffeine would shift reaction time, and give the synaptic reason.
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▸
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.
Today is individual work you can do from home: complete the same target above, then submit your CER.
Open the drop folderTurn 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:
Khan Academy: Neurons and Synapses- 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.