Course: Anatomy & Physiology I (BIOL 2301 + BIOL 2101) · Silver Oak University (fictional sample) · Prof. Navarro
Module: Week 14 of 16 · Fall 2026 · in-person, two 75-minute lectures + one weekly lab
Objective covered: Objective 7 — Describe the organization of the nervous system (CNS, PNS, ANS), including the peripheral cranial and spinal nerves and the somatic and autonomic divisions, and contrast the sympathetic and parasympathetic responses.

This file holds two pieces: (A) the Module 14 Overview page ("Start Here") and (B) the Welcome Announcement that drips out when the module opens. Dates below assume a Tuesday/Thursday lecture pattern with Week 14 meeting Tue Dec 1 and Thu Dec 3, a lab that same week, and end-of-week work due Sunday Dec 6, 11:59 p.m. Adjust the day-of-week and times to match your section.

(A) Module 14 Overview — Start Here

Welcome to Week 14: The Body's Autopilot

This is your home base for the week. Read it first, then work the checklist below from top to bottom. Everything you need is linked inside the module.

Last week we stayed inside the central nervous system — the brain and spinal cord. This week we follow the wiring out into the body: the peripheral nervous system (PNS), the cranial and spinal nerves that carry every signal in and out. And we meet the part of you that runs the show without ever asking permission — the autonomic nervous system, which governs your heartbeat, your pupils, your digestion, and your breathing-while-you-sleep automatically. The headline of the week is a single, high-yield contrast: sympathetic (fight-or-flight) versus parasympathetic (rest-and-digest).

The week's big question

"Who runs the autopilot — and how do two opposing branches of the nervous system keep your heart, gut, and pupils in balance without you ever deciding anything?"

By Friday you'll sort CNS from PNS, tell sensory (afferent) from motor (efferent), separate the voluntary somatic system from the involuntary autonomic system, and — most importantly — never again confuse sympathetic with parasympathetic.

By the end of this week, you can…

Use this as a checklist. If you can do all four out loud, you're ready for the quiz.

• [ ] Place a structure in the right division: the brain and spinal cord are the CNS; the 12 pairs of cranial nerves and 31 pairs of spinal nerves are the PNS.
• [ ] Tell afferent from efferent (sensory toward the CNS vs. motor away from it) and somatic (voluntary, to skeletal muscle) from autonomic (involuntary, to cardiac/smooth muscle and glands).
• [ ] Contrast the two autonomic branches: sympathetic = fight-or-flight (↑ heart rate, dilates pupils, opens airways, inhibits digestion) vs. parasympathetic = rest-and-digest (↓ heart rate, constricts pupils, stimulates digestion).
• [ ] Name the major parasympathetic nerve (the vagus, cranial nerve X) and explain why the two branches are antagonistic and maintain homeostasis.

What's due this week, and when

Work these in order — each one gets you ready for the next.

Heads-up on the AI tools: you'll use a chatbot to draft and explain, and then you judge its work against what we cover in class. On this topic chatbots are especially slippery — they routinely swap sympathetic and parasympathetic (claiming "rest-and-digest speeds the heart") or flip afferent and efferent. Catching the model is the point — in the tutorial, the assignment, and the lab.

Late policy reminder: 10% off per day late. If life happens, reach out before the deadline — I'd much rather hear from you early.

How to succeed this week

• Lead with the idea, not the jargon. The autonomic system is just your body's autopilot; "sympathetic" is just the gas pedal (fight-or-flight) and "parasympathetic" the brake (rest-and-digest). The vocabulary comes after the picture clicks.
• Memorize one column, flip it for the other. Don't memorize two lists. Learn every sympathetic effect as "what would help me fight or run?" — then get each parasympathetic effect by reversing it. Heart: sympathetic speeds, parasympathetic slows. Pupils: sympathetic dilates, parasympathetic constricts. Digestion: sympathetic pauses, parasympathetic stimulates.
• Use your own body as the lab. You will literally feel the sympathetic branch in your pulse this week (Lab 14). Notice the next time you're startled — that pounding heart and those wide pupils are the sympathetic response.
• Two hooks to keep: "Afferent Arrives (sensory, toward the CNS); Efferent Exits (motor, away)." And "Sympathetic = fight or flight; parasympathetic = rest and digest — and the vagus (cranial nerve X) is the great calming nerve."
• Treat the chatbot as a smart intern, not an oracle. It drafts; you check. On this topic especially, a confident chatbot will swap the two branches — and in the clinic, knowing which one races the heart is not optional.

You don't need anything memorized in advance — just bring your own two hands (you'll take your pulse) and a willingness to feel your nervous system at work. Come to class ready to explain why your heart jumped the last time a door slammed. See you Tuesday.

(B) Welcome Announcement — Module 14

Release setting: post on the module's start day (offset = 0 days), i.e., Tue Dec 1, 2026 — not before. If your platform won't preserve the scheduled date on import, post this as a draft labeled "Release: Tue Dec 1."

Subject: Welcome to Week 14 — who told your heart to race? 🫀

Hi everyone,

Quick warm-up before we start: think back to the last time a door slammed or your phone buzzed at 2 a.m. Your heart pounded, your eyes went wide, your stomach dropped — and you never decided any of it. So who gave the order? Not your conscious mind; you were as startled as your body. That little mystery is our way into Week 14: a huge amount of your physiology runs on autopilot, governed by a part of the nervous system we're about to map.

This week — The Peripheral & Autonomic Nervous System — we tackle the big question: Who runs the autopilot, and how do two opposing branches keep your heart, gut, and pupils in balance without you ever thinking about it? By Friday you'll sort the CNS (brain + spinal cord) from the PNS (12 cranial + 31 spinal nerve pairs), tell sensory from motor and voluntary from involuntary, and — the headline — never again confuse sympathetic (fight-or-flight) with parasympathetic (rest-and-digest).

Three things not to miss:
1. Lecture Tutorial 14 — work through the PNS divisions and the two autonomic branches with one approved chatbot (Gemini, Claude, or ChatGPT) and submit the share link. You'll catch the model's mistakes — and on this topic it loves to swap the two branches. Due Sun Dec 6.
2. Lab 14 ("Reading Your Own Autopilot"), Quiz 14, Discussion 14, and Assignment 14 also close Sun Dec 6 — the lab has you take your own pulse before and after light activity, so you'll feel the sympathetic shift firsthand. Start early; it's genuinely fun.
3. Open the Start Here page first — it lays out everything in order with due dates.

One tip that makes this whole week easy: don't memorize two lists. Learn the sympathetic effects as "what would help me fight or run?" — then get every parasympathetic effect by simply flipping it. Heart speeds vs. slows; pupils dilate vs. constrict; digestion pauses vs. resumes. Do that, and the quiz, the lab, and the assignment all fall into place.

Bring your curiosity (and your own two hands — you'll be taking your pulse) to class on Tuesday.

See you soon,
Prof. Navarro