Welcome, AP Biology explorers! In this WebQuest, you’ll dive into the heart of College Board Unit 2 — Membrane Permeability. Through a dynamic mix of video, reading, simulation, and a review game, you will gain a firm grasp on how and why cell membranes are selectively permeable, how molecules get across, and how these concepts connect to homeostasis, gradients, and transport mechanisms. Take your time, think deeply, and answer the questions fully. Let’s get started! Answer key included.