BLOOD LEVELS By N., Pam M.S. - April 7, 2013 The amount of different substances in a set quantity of blood. A known range or amount is known to be either toxic or normal. BLOOD LEVELS: "Joe's blood levels showed a high level of alcohol." Related Psychology Terms BLOOD LEVELS BEHAVIORAL TOXICITY ACHROMATIC INTERVAL BELOW AVERAGE BEHAVIORAL TOXICOLOGY AREA POSTREMA ANTIVIRAL DRUGS ASPHYXIA BLOOD SUGAR BLOOD SUGAR Cite this page: N., Pam M.S., "BLOOD LEVELS," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/blood-levels-2/ (accessed December 6, 2019).