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.
WINDSHIELD SURVEY. Adapted from the Windshield Survey activity created by Communities & Physicians Together, University of California Davis. All rights reserved. 2003. The purpose of this survey is to assist you in identifying objective data that will help you define where your patients and their children live. You are to identify the community, trends, stability, and changes that may affect the health of the patients that you are serving. You are to assess one of the following neighborhoods where your patients may live.