Ultrasonic effects on mammalian intestinal muscle membrane.
The effects of ultrasound on the bioelectric activities of rat intestinal muscle were studied. It was found that low level ultrasound of 1.5 W/cm2 inhibited action potentials of the intestinal smooth muscle. This biophysical action of ultrasound had accumulative effects. The presence of high Ca++ in the medium (3.4 mM or 2 x normal [Ca++]) prevented this action of ultrasound. These data suggested that ultrasound probably acted on the calcium influx mechanism of the cell membrane.
D000200:Action Potentials; D000818:Animals; D002118:Calcium / Q000502:physiology; D002462:Cell Membrane / Q000502:physiology; D007583:Jejunum; D009130:Muscle, Smooth / Q000502:physiology*; D051381:Rats; D014465:Ultrasonics / Q000009:adverse effects
D002118:Calcium