Membrane permeability.
D001692:Biological Transport; D002352:Carrier Proteins; D007473:Ion Channels; D016623:Ion Pumps; D008565:Membrane Proteins; D008566:Membranes / Q000502:physiology; D010539:Permeability; D017981:Receptors, Neurotransmitter
D002352:Carrier Proteins; D007473:Ion Channels; D016623:Ion Pumps; D008565:Membrane Proteins; D017981:Receptors, Neurotransmitter