Proton and Sodium-potassium pumps Flashcards Preview

AP Biology 2014 > Proton and Sodium-potassium pumps > Flashcards

Flashcards in Proton and Sodium-potassium pumps Deck (10):

Active Transport

The mode of transportation that allows a cell to pump a solute against its concentration gradient; this movement mechanism allows a cell to maintain its own inner concentration from its surrounding environment. This mode requires ATP. 


Sodium-Potassium Pump

A transport protein that uses ATP to maintain the balance of Naoutside the cell and the balance of K+inside the cell. 


Proton Pump

this pump use energy to transport protons from the matrix into the inter membrane space. Thus, it forms a concentration gradient between the outside and inside of the matrix. 


Concentration Gradient

this concept results with the uneven distribution of ions across the cell membrane.


Electrogenic Pump

An ion pump that creates a flow of charges; also, it creates a charge imbalance.

*hint: another type of pump is categorized similarly; thinking transportation of ions only. 


Transport Protein

This protein helps move molecules in and out of the cell with help of ATP. 


ATP (adenosine triphosphate)

The energy of life; this molecule powers many metabolic processes in the cell and helps transport protein moves molecule in and out of the cell. 


What is a proton pump's role in producing ATP?

After amassing a large quantity of H+ outside the cell, the hydrogen travels through the an enzyme ATP synthase and combined with the ADP molecule to form ATP. This results in chemiosmosis. 


Why are proton and sodium-potassium pumps necessary for a cell to have?

Because the cell membrane has a phospholipid bilayer, only small, uncharged, polar molecules and hydrophobic molecules can cross the membrane. All large polar molecules and ions cannot diffuse inside. 


Electrochemical Potential

This molecular process helps store energy in the cell as potential energy and helps molecules diffuse through the membrane.