BIO 111 Lecture Notes - Lecture 9: Organelle, Plasmodesma, Ion Transporter

• School: Ball State University
• Department: Biology
• Course: BIO 111
• Professor: Mager

Document Summary

Bio 111 lesson 9 things work together to diffuse . Facilitated diffusion: no input of cellular energy, molecules move down concentration gradient uses . Channel proteins: inner lining is hydrophilic so polar molecules can pass through. Carrier proteins: alternate between 2 shapes which one used will be specific to the substance. Active transport: cellular energy input needed atp! molecules move against concentration gradient. Cotransport== coupling active transport and diffusion first, active transport occurs, which sets up for diffusion occurs and releases energy, which powers the proton pump. Bulk transport mechanisms are used to move a large amount of stuff in our out of cell. Exocytosis- moving molecules outside of a cell requires energy (active) for large molecules that can not pass through membrane by a protein. Endocytosis- moving large molecules into the cell. (active) three different mechanisms: Phagocytosis- eating, large particles like food or bacteria meet the membrane and are packaged into a food vacuole.