Examlex
An Internet site's address on the World Wide Web is a(n) :
Semipermeable Membrane
A barrier that allows certain molecules or ions to pass through it by diffusion while blocking others, often used in osmosis.
Sodium-Potassium Pump
A type of active transport mechanism that moves sodium ions out of and potassium ions into cells, essential for maintaining cell potential and volume.
Resting Potential
The voltage difference across the neuron's plasma membrane when it is not transmitting a signal, providing the neuron with the potential energy needed for activation.
Voltage Gradient
Difference in charge between two regions that allows a flow of current if the two regions are connected.
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