| 释义 |
presynaptic membrane pre·syn·ap·tic mem·branethat part of the plasma membrane of an axon terminal that faces the plasma membrane of the neuron or muscle fiber with which the axon terminal establishes a synaptic junction; many synaptic junctions exhibit structural presynaptic characteristics, such as conic electron-dense internal protrusions, which distinguish it from the remainder of the axon's plasma membrane. See also: synapse. pre·syn·ap·tic membrane (prē'si-nap'tik mem'brān) That part of the plasma membrane of an axon terminal that faces the plasma membrane of the neuron or muscle fiber with which the axon terminal establishes a synaptic junction. See also: synapsepresynaptic membrane the excitable membrane of the axon terminal next to the dendrite at a synapse. |