GENERAL HISTOLOGY

Detailed explanation-1: -Action potential in a neuron, showing depolarization, in which the cell’s internal charge becomes less negative (more positive), and repolarization, where the internal charge returns to a more negative value.

Detailed explanation-2: -This means that the interior of the cell is negatively charged relative to the outside. Hyperpolarization is when the membrane potential becomes more negative at a particular spot on the neuron’s membrane, while depolarization is when the membrane potential becomes less negative (more positive).

Detailed explanation-3: -Changes in membrane potential involve either depolarization (i.e., a decrease in transmembrane potential) or hyperpolarization (an increase in the potential difference across the membrane).

Detailed explanation-4: -The Action Potential. The movement of a signal through the neuron and its axon is all about ions. An ion is a charged particle, such as Na+, the sodium ion. It has a positive charge, because it is missing one electron.

Detailed explanation-5: -Opening and closing ion channels alters the membrane potential. In a neuron, the resting membrane potential is closer to the potassium equilibrium potential than it is to the sodium equilibrium potential.