As it binds to adenosine receptors, it slows down our nerve cell activity, which then causes drowsiness. A nerve cell mistakes caffeine for adenosine. Therefore, caffeine binds with the adenosine receptor, but rather than slowing down the cell's activity, the nerve cells speed up. While adenosine opens up blood vessels, allowing for more oxygen intake, caffeine constricts these blood vessels.
windshield - transparent screen (as of glass) to protect occupants of a vehicle. windscreen. aeroplane, airplane, plane - an aircraft that has a fixed wing and is powered by propellers or jets; the flight was delayed due to trouble with the airplane.
Safety glass is used in all automobile glass. It is manufactured to reduce the likelihood of injury, if it breaks. Windshields are made from a lamination process. The windshield glass in your car is made of laminated glass, which is designed to offer highest levels of safety in the event of a crash. The laminated glass is made up of two pieces of glass, with a thin layer of vinyl between them.