BIOL 101 1st Edition Lecture 6 Outline of Last Lecture I Nucleic Acid II The Cell a What exists in what type of cell Outline of Current Lecture Membrane Structure and Function I Compare Contrast Passive Transport Simple Diffusion SD Passive Transport Facilitated Diffusion FD Active Transport AT II Passive Transport Osmosis III Bulk Transport what are the types Why the various types Which way will water move Current Lecture Membrane Structure and Function Class Discussion Objectives Discriminate between passive transport active transport and bulk transport of molecules across a membrane Predict how water will move via osmosis and explain why this is critical to your cells Even though water is polar it is very small and can pass freely through the membrane When large amounts of water move quickly across a membrane kidney we find transporter proteins called aquaporins I Compare Contrast Passive Transport Simple Diffusion SD Passive Transport Facilitated Diffusion FD Active Transport AT Follows concentration gradient high to low simple diffusion or facilitated diffusion Requires ATP active transport These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Movement of ions against a concentration gradient active transport Movement of oxygen and carbon dioxide down a concentration gradientsimple diffusion Requires a transport protein facilitated diffusion and active transport Movement of glucose down a concentration gradient facilitated diffusion Movement of water down a concentration gradient facilitated diffusion and simple diffusion If glucose transporters are missing then they are going to have trouble making energy Diabetes is a problem with glucose transport they cannot get glucose into their cells II Passive Transport Osmosis Which way will water move Water will move to the left because it wants to equal out the concentration on either side The left side is hypertonic because it has more solute the right side is hypotonic because it has less solutes Water is more concentrated on the right therefore its going to more to the left its lower concentration gradient I Bulk Transport what are the types Why the various types Bulk transport allows for the movement of a lot more or larger molecules through cells A A white blood cell engulfs a bacterium phagocytosis B Many insulin proteins are exported out of the cell after leaving the Golgi Apparatus exocytosis C Transferrin receptors on the outer surface of bone marrow stem cells attach to the protein transferrin which has iron bound to it The proteins and the bound iron are brought into the cell via small vesicles receptor mediated endocytosis Extracellular fluids and any solutes dissolved within the fluid are brought into the cell in small vesicles pinocytosis
View Full Document
Unlocking...