Scientists are studying bats and their use of echolocation to learn more about how bats process information to understand and adapt to the world around them. Echoes of hunting They detect and catch their targets through echolocation, or biosonar, the animal equivalent--and precursor--to man-made sonars. How to see what whales hear: biomedical imaging reveals new insights into marine mammal ears
The faster repolarization of the cardiac action potential causes the tenting of the T waves, and the inactivation of sodium channels causes a sluggish conduction of the electrical wave around the heart, which leads to smaller P waves and widening of the QRS complex.
The T wave: The T wave represents the wave of repolarization, as the ventricle prepares to fire again. The T wave is normally upright in leads I, II, and V3-V6. It is normally inverted in lead R. Ts are variable in the other leads (III, L, F, and V1-V2). T wave abnormalities may be seen with, or without ST segment abnormality.