BIOA01H3 Lecture Notes - Lecture 19: Active Transport, Electrochemical Gradient, Autocrine Signalling

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Maydianne Andrade

Document Summary

October 13, 2014 10:58 pm: active transport. When phosphate combines with the carrier protein, it allows for a higher energy state that allows it to bind to the carrier protein. The carrier protein undergoes a transition state where it switches up to allow molecules in the higher concentration. Then it"s switched back around, and a p is released. Concentration difference + electrical charge difference = electrochemical gradient https://onedrive. live. com/edit. aspx/documents/biology?cid=4612573e81e7633b&id=documents&wd=target%281. 1%20october. one%7c788e3535-300c-4b77 1/11. When a channel molecule undergoes a conformational change. The potassium sites become high infinity, bind to potassium, and potassium ion is released inside he cell and the protein goes back to its original state. Then you have more positive ions inside the cell than outside the cell, creates an electrical potential difference across the membrane. Contains potential energy that can be used to do something else. Def: transport proteins use ions concentration gradient (from primary active transport) to drive transport of a different molecule: active transport, secondary active transport https://onedrive. live. com/edit. aspx/documents/biology?cid=4612573e81e7633b&id=documents&wd=target%281. 1%20october. one%7c788e3535-300c-4b77 2/11.