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.
T wave. In general, T waves are in the same direction as the largest deflection of the QRS (normally the R wave). Negative in AVR Inverted T waves in precordial leads V1, V2, V3 can be seen in normal, young athletes Low T voltage changes may occur in the absence of any heart disease at all.