What is happening in the neuron? A polarized cell is a
there is
__and outside it there is
In a polarized cell
the sodium gates are normally!
potassium gates are
and the Sodium/Potassium pump is turned
When a
stimulus is received the sodium gates
_and sodium rushes
the cell. Because it is positively charged it repels the other positive charged ion,
which gets pushed
the cell. The cell is then considered
This is when the impulse is conducted down the
For
a more rapid transmission, some neurons have lipid layer called
that causes impulses to jump and take a shortcut. After the stimulus is
gone, the cell is
which means the
flows back into the cell and the
gets
pumped out of the cell to restore it to a resting cell.

A62-year-old man is being treated for an acute myocardial infarction. he originally came to the ed with substernal chest pain and diaphoresis. given his risk factors of hypertension, diabetes, tobacco use, and family history, he is considered high risk. an ecg in the ed reveals a left-bundle branch pattern, and cardiac enzymes are elevated slightly. after a focused evaluation in the ed, the patient receives iv thrombolytics. although his bundle branch pattern never resolves, the patient is chest pain-free and haemodynamically stable after thrombolysis. two days later, however, the patient reports episodes of recurrent chest discomfort and shortness of breath overnight. in evaluating for potential myocardial reinfarction, which of the following is the most appropriate diagnostic test? - creatinine kinase- dynamic ecg changes- lactate dehydrogenase- myoglobin levels- troponin i level