💧 Cell Membrane & Transport

Chapter: The Cell · Level ★★☆ · Time: 25 min

SCORE___ / 20

NameClassDate

After this worksheet you can

Describe the fluid mosaic modelClassify transport typesPredict osmosis outcomesDistinguish passive/active

📚 Quick Recap

🎯 What you'll practice: Membrane structure and the five transport mechanisms, including osmosis outcomes.

🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11

5Hydrophilic heads face , toward water.

6Plasmolysis occurs in a solution.

7Distinguish diffusion from facilitated diffusion.

8What happens to an animal cell in a hypertonic solution?

9Name the process by which a cell engulfs large particles.

🚀 Section C · Challenge ● CHALLENGE 5

10A red blood cell placed in pure water bursts, but a plant cell in the same water only becomes turgid. Explain the difference.

💭 Reflection — the most useful thing I learned:

A ___/4 B ___/11 C ___/5 Total ___/20 Teacher's Signature Parent's Signature

✂ answer key — fold or cut before handing out

1-B 2-B 3-B 4-B | 5 = outward 6 = hypertonic 7 = diffusion needs no protein and moves any small molecule down its gradient; facilitated diffusion uses a channel protein but is still passive (no ATP) 8 = it shrinks (crenation/plasmolysis-equivalent in animal cells) as water leaves toward the higher solute concentration outside 9 = phagocytosis (a form of endocytosis) | 10 = Both cells experience the same osmotic pull of water inward, but the red blood cell has only a flexible plasma membrane with no external support, so the incoming water causes it to swell until it bursts (lysis); the plant cell has a rigid cellulose cell wall surrounding its membrane, which resists the internal pressure and simply becomes turgid (firm) instead of rupturing.

📄 Need offline practice?Print this worksheet or open the one-page cheat sheet.

🗒 Cheat Sheet

🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4

🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11

🚀 Section C · Challenge ● CHALLENGE 5