Action Potential and Excitatory Postsynaptic Potential

Home Paper 1: Behavior Possibilities There are a series of events that can bring about the possibility of action. Neurons can send and receive inputs from other neurons via chemicals called neurotransmitters that are preserved in postsynaptic membranes. If the input is sufficiently strong, the neuron sends a message from the dendrite to the neuron downstream of the axon terminal. This is the process of stimulating other neurons. The action potential is an electrical excitation that moves along the membrane neuron to the end of the synapse (Inlow, 2013).

Postsynaptic potential (PSP) is the staging potential in neuronal dendrites that receive synapses from other cells. The postsynaptic potential can be depolarized or hyperpolarized. The depolarization of the postsynaptic potential shifts the membrane potential toward the threshold and is therefore called the excitatory postsynaptic potential (EPSP). Hyperpolarization of the postsynaptic potential is an inhibitory postsynaptic potential (IPSP) as it moves the membrane potential away from the threshold.

They cause excitatory electrical changes at postsynaptic potential (EPSP). This occurs when the net effect of emitter release is to depolarize the membrane and approximate the electrical threshold at which the action potential is released. This effect is usually mediated by the opening of the membrane channel of sodium channels and calcium ions (the type of pores passing through the cell membrane). They in turn cause an inhibitory postsynaptic potential (IPSP), as the net effect of emitter emission in turn makes it hyperpolarize the membrane and makes it harder to reach the electrical threshold potential. This type of inhibitory synapse functions by opening various ion channels in the membrane. Conventional chloride (Cl -) or potassium (K +) channels

Binding of specific neurotransmitters results in the opening of a particular ion channel (in this case ligand-gated channel) on the postsynaptic membrane. Neurotransmitters may exert excitatory or suppressive effects on postsynaptic membranes. Several well-known examples of neurotransmitters are detailed in the table. For example, when acetylcholine is released at the synapse (called a neuromuscular junction) between the nerve and muscle of the presynaptic neuron, the postsynaptic Na + channel is opened. Na + enters postsynaptic cells and depolarizes postsynaptic membranes. This depolarization is called excitatory postsynaptic potential (EPSP), making it easier for postsynaptic neurons to induce action potentials. The release of neurotransmitters in inhibitory synapses causes inhibitory postsynaptic potential (IPSP), hyperpolarization of the presynaptic membrane