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. 

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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. 

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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. 

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Concentration Gradient

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

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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. 

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Transport Protein

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

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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. 

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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. 

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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. 

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Electrochemical Potential

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

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