A conditioned reflex is one acquired as the result of experience. When an action is done repeatedly the nervous system becomes familiar with the situation and learns to react automatically, and a new reflex is built into the system.ough reflex the sequence of events initiated by the sensitivity of the lining of the airways and mediated by the medulla as a consequence of impulses transmitted by the vagus nerve, resulting in coughing, i.e., the clearing of the passageways of foreign matter.
TNT Express, one of the worldâs largest. express delivery companies, ensures that. parcels, documents and freight items are. delivered safely and on time throughout the. world. TNT provides a wide range of time definite. and day definite express delivery services in. over 200 countries.
As for TNT, it's also a high explosive, but it ain't dynamite. TNT is a yellowish compound with the chemical name trinitrotoluene(try-night-row-TALL-you-een), which is somewhat easier to remember than its chemical formula, CH 3C6H2(NO2)3. TNT was discovered in Germany in 1863 by Joseph Wilbrand. Although not quite as powerful as dynamite (and harder to detonate), the main benefit of TNT is that it's even more stable than dynamite (Wilbrand, for instance, never lost a single brother to an explosion). Also, TNT can be melted down and poured into shell casings.