Science - TEAS Study Guide | Nurse.org
Menu
View:
▶ Watch a 2-min intro (optional)
Immune System - Crash Course A&P · via Crash Course Watch on YouTube →

Immune System

Why This Matters for Nursing: Infection prevention is central to nursing. Understanding immunity helps you protect vulnerable patients, explain vaccines, recognize infection signs, and understand immunocompromised conditions.

What You Need to Know

The immune system defends the body against pathogens (bacteria, viruses, fungi, parasites) and abnormal cells (cancer).

Two Main Divisions:

Type Response Time Specificity Memory
Innate (Non-specific) Immediate General No
Adaptive (Specific) Days Targeted Yes
Two Lines of Immune Defense 🦠 Pathogen Enters Body 🛡️ INNATE IMMUNITY (Non-specific) Responds: IMMEDIATELY 🧱 Skin & Mucous membranes 🔥 Inflammation & Fever 🔴 Neutrophils (eat pathogens) 🍽️ Macrophages (phagocytosis) 🩸 NK cells (kill infected cells) No memory — same response each time 🎯 ADAPTIVE IMMUNITY (Specific) Responds: Days (but remembers!) 🔵 B cells → Antibodies 🟢 T cells → Kill infected cells 🛡️ Memory B & T cells 💉 Vaccines use this system 🏷️ Antigens trigger response Has memory — faster next exposure VS Both work together: Innate buys time → Adaptive eliminates specific threat → Memory prevents future illness

🔓

You've used your 1 free study guide

You've got the first section as a preview. Unlock every study-guide topic — full lessons, inline checks, the complete practice bank + timed exam simulation — with a free trial.
Your one free lesson stays free, always.

Unlock all topics — free for 3 days

$0 today — card required to start your trial. Cancel anytime before day 3.

Already subscribed? Log in.

🤖 AI Tutor

Loading...

👋 Hi! I'm your TEAS Tutor

Ask me anything about Math, Reading, Science, or English!

📐 How do I convert fractions to decimals?
🔬 Explain arteries vs veins
✏️ What are the parts of speech?

Wait! Grab your free cheat sheet

Get the essential TEAS formulas, conversions, and must-know facts in one printable PDF.

📋 FREE: TEAS Quick Reference Cheat Sheet

✓ Check your inbox! Your cheat sheet is on its way.

No spam. Unsubscribe anytime.