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james lafon

terms and definition in physiology of circulation

TermDefinition
Blood flow Volume of blood moving through a vessel in a given time.
Cardiac Output volume of blood pumped by the heart per minute
Resistance opposition to blood flow, mainly due to friction
Friction Opposition to flow in blood vessels, influenced by vessel dimensions.
Blood Viscosity Internal resistance to flow, influenced by cellular and solute content
Polycythemia Condition increasing blood viscosity due to elevated red blood cell count
Dehydration Condition increasing blood viscosity due to reduced fluid volume
Blood pressure Force per unit area on blood vessel walls.
Pulse pressure Difference between systolic and diastolic pressure.
Radial pulse Pulse taken at the wrist for monitoring.
Blood volume Total amount of blood in the circulatory system.
Hypothalamus Brain region involved in stress response and blood pressure regulation
Epinephrine Hormone increasing heart rate and vasoconstriction.
Norepinephrine Hormone increasing heart rate and vasoconstriction.
Angiotensin II Hormone stimulating vasoconstriction.
Atrial Natriuretic Peptide Hormone deceasing blood pressure by antagonizing aldosterone.
Created by: jameslafon
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