BLOOD PRESSURE By N., Pam M.S. - April 7, 2013 The pressure that is exerted by the blood against the vessel walls. The pressure changes with the strength of the heart beat. A sphygmomanometer is used. BLOOD PRESSURE: "Blood pressure is measured in millilitres of mercury." Related Psychology Terms BLOOD PRESSURE SYSTOLIC BLOOD PRESSURE PULSE BARORECEPTOR PRESSOR EFFECT DIASTOLIC BLOOD PRESSURE AMYL NITRITE VASOCONSTRICTOR THROMBOSIS PREORGASMIC Cite this page: N., Pam M.S., "BLOOD PRESSURE," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/blood-pressure-2/ (accessed January 21, 2020).