Table 4: The summarization of the electrophysiological properties of the primo vascular system.

TargetMethodologyCell TypeResultReference

Primo nodeIntracellular recordingVascular smooth muscle likeExcitable
(Muscarinic receptor, ion channel)
Patch clamp,
Current-voltage relationship
Four typesNonexcitable cell
( ion channel for Type I)
Extracelluar recordingTwo typesExcitable cell
(not smooth muscle like)

Primo ductIntracellular recordingSmooth muscle
Secreting cell
Immune cell