Cell Membrane Permeability and Membrane Potential

Vocabulary flashcards covering key terms on membrane permeability, glucose phosphorylation, electrical gradients, and resting membrane potential.

Impermeable

A condition in which solute cannot pass through a membrane, causing water to move to dilute the solute.

Glucose-6-Phosphate

The phosphorylated form of glucose formed upon entry into the cell, which prevents glucose from passing back out through the membrane.

Electrical Gradient

The difference in charge across a cell membrane between the outside ($+$) and inside ($-$), where moving charges function as energy.

Resting Membrane Potential

The steady electrical potential difference across a cell membrane at rest, shown at $-70\,\text{mV}$ and maintained with the help of $\text{Na}^+$ and $\text{K}^+$ channels.

Moving Charges

The movement of charged particles across the cell membrane, which represents cellular electrical energy.