depolarisationen
Depolarisationen are changes in the membrane potential of a cell in which the inside of the cell becomes less negative (more positive) relative to the outside. They are a central feature of electrical signaling in many excitable cells, including neurons, cardiac muscle cells, and skeletal muscle fibers. A depolarisation can be subthreshold, contributing to graded potentials, or large enough to trigger an action potential when a critical threshold is reached.
In neurons, the resting membrane potential is typically around -70 mV. A depolarising stimulus opens voltage-gated
Depolarisationen play a role in synaptic transmission (excitatory postsynaptic potentials), muscle contraction, and the propagation of