Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Active Transport |
The movement of a substance across a biological membrane against its concentration or electrochemical gradient with the help of energy input and specific transport proteins |
|
|
Sodium-Potassium Pump |
A special transport protein in the plasma membrane of animal cells that transport sodium out of the cell and potassium in the cell against its concentration gradient |
|
|
Membrane Potential |
The charge difference between a cell's cytoplasm and extracellular fluid, due to the differential distribution of ions |
|
|
Electrochemical Gradient |
The diffusion gradient of an ion, representing a type of potential energy that accounts for both the concentration difference of the ions across the membrane and its tendency to move relative to the membrane potential |
|
|
Electrogenic Pump |
An ion transport protein that generates voltage across a membrane |
|
|
Proton Pump |
An active transport mechanism in a cell membranes that uses ATP to force hydrogen ions out of a cell, generating a membrane potential in the process |
|
|
Cotransport |
The coupling of the "downhill" diffusion of one substance to the "uphill" transport of another against its own concentration gradient |
|
|
Exocytosis |
The cellular secretion of macromolecules by the fusion of vesicles with the plasma membrane |
|
|
Endocytosis |
The cellular uptake of macromolecule and particulate substances by localized regions of plasma membrane that surrounded the substances and pinch off to form intracellular vesicle |
|
|
Ligands |
A molecule that binds specifically to a receptor site of another molecule |
