If symptoms of exocrine pancreatic insufficiency are apparent, a number of pancreatic function tests can be done. A serum sample that measures the amount of the chemical trypsinogen (TLI) released into the blood from the pancreas should reveal problems in the pancreas. A dog with EPI will have reduced amounts of TLI.
Neuron Resting Potential-Resting Membrane Potential of the neuron. The voltage difference between the intracellular space and the extracellular space when a neuron is in its non-activated state, is the cells resting potential, which is around -- 70 mV. The resting potential is the electrical charge the cell has when it is resting and when it is not stimulated by any open ion channels.
The Action Potential [back to top]. The resting potential tells us about what happens when a neurone is at rest. An action potential occurs when a neurone sends information down an axon. This involves an explosion of electrical activity, where the nerve and muscle cells resting membrane potential changes.f the depolarisation is not great enough to reach the threshold, then an action potential (and hence an impulse) will not be produced. This is called the all or nothing law. This means that the ion channels are either open or closed; there is no half-way position.