Chapter 5 A. The Movement of Substances Across cell membranes Learning Obiectives: 1. Principles of membrane transport; 2. Passive transport and active transport; 3. Two main classes of membrane transport proteins: Carriers and Channels: The ion transport systems; 5. Endocytosis and Phagocytosis: cellular uptake of macromolecules and particles.Chapter 5 Learning Objectives: 1. Principles of membrane transport; 2. Passive transport and active transport; 3. Two main classes of membrane transport proteins: Carriers and Channels; 4. The ion transport systems; 5. Endocytosis and Phagocytosis: cellular uptake of macromolecules and particles. A. The Movement of Substances Across Cell Membranes