Examlex
Why is the atmospheric pressure at the surface of Venus so much higher than Earth's?
Sodium-Potassium Pump
A membrane-bound transporter enzyme present in many cell (plasma) membranes that pumps sodium out of cells while pumping potassium into cells, thus maintaining the concentration and electrical gradients of these ions.
Endocytosis
Process by which a cell takes in a small amount of extracellular fluid (and its contents) by the ballooning inward of the plasma membrane.
Exocytosis
Process by which a cell expels a vesicle’s contents to extracellular fluid.
Entropy
A measure of disorder or randomness in a system, often associated with the second law of thermodynamics.
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