BIOL 100 Lecture Notes - Lecture 17: Clathrin, Exocytosis, Facilitated Diffusion
23 May 2016
School
Department
Course
Professor
Document Summary
The membrane is selectively permeable: only certain things can enter and leave, it involves bringing things in and out of the cell. 2 types of membrane transport: active requires energy, atp ions or molecules are moved across the membrane against the concentration gradient. Atp will be used either directly or indirectly. 3 types of systems involved in active transport. This will move a single solute in one direction. When you move 2 solutes in opposite directions. Atp is used directly for pumping the system (for whatever its pumping) This is using the established gradient of primary active transport to move a substance and atp is used indirectly. This could never happen if the primary never happened first. Endocytosis: you are bringing a molecule into the cell. Phagocytosis: cell eating (taking a large vacuole into the cell, or another cell) Pinocytosis: cell drinking (bringing fluid into the cell)
