BIOL 2410 Lecture Notes - Lecture 14: Excitatory Postsynaptic Potential, Inhibitory Postsynaptic Potential, Neuromuscular Junction

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 2410
• Professor: Diana Mlinar

Document Summary

Neuron physiology v - electrical signalling in the neuron. The synapse is a connection between a neuron and another cell. The cell before the synapse is the pre-synaptic cell. The cell after the synapse is the post-synaptic cell. When a synapse is active the post-synaptic cell will experience a graded potential. Depolarizing graded potentials are excitatory post-synaptic potentials (epsp) Hyper polarizing graded potentials are inhibitory post-synaptic potentials (ipsp) To determine if the graded potential is supra threshold you must sum all of the epsp and. Occur in cells that are connected by gap junctions. Cytoplasm is able to ow between the two cells. Electrical connection between the two cells allows ions to ow. Signal rapidly spreads directly from one cell to another. Each cell does not require its own external stimulus to be activated. A more depolarized cell can excite a less depolarized cell. A less depolarized cell can also inhibit a cell that has a greater degree of depolarization.