Hey JedKampe, There are numerous drugs and conditions that can cause a false positive for cocaine not to mention human error. Substances that can cause a false positive drug test result: Amoxicillin is an antibiotic in the penicillin group of drugs. It fights bacteria in your body. Ampicillin is another antibiotic similar to amoxicillin.
When the nerve is damaged,the action potential remains between the electrodes and doesn't reach the second electrode (i.e potential difference remains positive and doesn't go into negative phase) , the biphasic action potential changes into monophasic action potential i.e with single phase. Source(s):E: biphasic action potential change into the monophasic action? Why does the biphasic action potential change into the monophasic action potential after nerve injury between the two recording electrodes?
That stops the reflection of the pressure wave giving a flow pattern with only one sound - in a forward direction - which is described as monophasic. Biphasic and triphasic flow patterns are normal in a resting person. Monophasic flow generally indicates significant peripheral vascular disease. There are conditions in which a monophasic signal is detected in the absence of significant arterial disease: hyperemia due to inflammation or infection or sympathetic tone (nervous system influence).