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the claim
The blood flow rate through every blood vessel per minute is constant
the verdict
REFUTED
the evidence says no
refutedsupported
the weight of evidence
0 sources for · 3 against

Blood flow rates through blood vessels are not constant per minute; rather, they fluctuate dynamically due to physiological autoregulation, vasomotor tone changes, and pulsatile cardiac activity. Evidence demonstrates that regional blood flow actively adapts to metabolic needs, pressure changes, and pharmacological interventions.

Evidence against · 3
Contribution of Flow-Dependent Vasomotor Mechanisms to the Autoregulation of Cerebral Blood Flow
2012 · cited by 114
Paper 0 discusses the active autoregulation of cerebral blood flow via pressure- and flow-induced constrictions and dilations, demonstrating that flow varies dynamically rather than remaining constant.
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The analysis

The claim states that the blood flow rate through every blood vessel per minute is constant. Physiological principles and the provided literature (such as papers 0, 1, and 7) establish that blood flow is inherently pulsatile, regionally variable, and dynamically regulated through mechanisms like autoregulation and vasomotor tone changes. Therefore, the claim is directly refuted by established cardiovascular physiology.

More against · 2
Effects of a nonpressor dose of neuropeptide Y on cardiac output, regional blood flow distribution and plasma renin, vasopressin and catecholamine levels.
1988 · cited by 26
Paper 1 measures variable regional blood flow distribution and cardiac output changes in response to physiological states and interventions.
Modeling Pressure-Dependent Wave and Vessel Compliance in the Brain Following Middle Cerebral Artery Occlusion.
2026 · cited by 1
Paper 7 models pressure-dependent wave dynamics, vascular compliance, and pulsatility of blood flow, showing that flow fluctuates and adapts dynamically in response to varying pressures.
Everything we examined (12)
  1. Contribution of Flow-Dependent Vasomotor Mechanisms to the Autoregulation of Cerebral Blood Flowpeer-reviewedrefutes
  2. Effects of a nonpressor dose of neuropeptide Y on cardiac output, regional blood flow distribution and plasma renin, vasopressin and catecholamine levels.peer-reviewedrefutes
  3. 3D Quantitative-Amplified Magnetic Resonance Imaging (3D q-aMRI).peer-reviewedno side takennot shown: read and judged not to bear on this claim
  4. Revisiting Concepts of Thermal Physiology: Understanding Feedback and Feedforward Control, and Local Temperature Regulation.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  5. Applied physiology at the bedside: using invasive blood pressure as a true monitoring tool.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  6. Multi-Frame Image Registration for Automated Ventricular Function Assessment in Single Breath-Hold Cine MRI Using Limited Labels.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. Noradrenergic Slow Vasomotion: The Hidden Fluid Pump Linking Sleep, Brain Clearance, and Dementia Pathogenesis.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  8. Modeling Pressure-Dependent Wave and Vessel Compliance in the Brain Following Middle Cerebral Artery Occlusion.peer-reviewedrefutes
  9. Differential Gene and Protein Expressions Responsible for Vasomotor Signaling Provide Mechanistic Bases for the Opposite Flow-Induced Responses of Pre- and Post-Circle of Willis Arteries.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. Fetal Hepatic Circulation: From Vascular Physiology to Doppler Assessment.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. Long-Term External Counterpulsation Reduces Beat-to-Beat Blood Pressure Variability Without Changing Arterial Blood Pressure in Ischemic Stroke: A Retrospective Case-Control Study.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  12. Role of adipose tissue in cardiovascular health and diseases.peer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → REFUTED · 1305 Aug 2026
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