Vascular Resistance and Blood Flow

What is the relationship between increased blood viscosity and cardiovascular disease risk, based on Poiseuille's Law?

• Higher viscosity speeds up blood flow

• Higher viscosity increases blood pressure, raising cardiovascular risk

• Viscosity doesn’t affect blood pressure

• Higher viscosity reduces pressure on vessel walls

Why does blood flow faster in narrow vessels, yet blood pressure remains high in these areas? Use Bernoulli's principle.

• High speed reduces pressure

• Fast flow doesn’t affect blood pressure

• High pressure is needed to maintain flow in narrow areas

• Blood pressure decreases because vessels widen afterward

A patient experiences a blockage in a major artery. Analyze its impact based on biology, physics, and chemistry perspectives.

• Biology: More oxygen supply to tissues; Physics: Slower blood flow; Chemistry: Increased oxygen levels

• Biology: Increased hemoglobin; Physics: Decreased blood pressure; Chemistry: Stable blood pH

• Biology: Normal blood flow; Physics: Constant pressure; Chemistry: No changes in chemical reactions

• Biology: Disrupted oxygen delivery; Physics: Increased blood pressure; Chemistry: Acidosis due to CO₂ build up

Tags

NGSS.HS-LS1-3

Resistance

• The force exerted by blood on arterial walls during ventricular relaxation

• The force exerted by blood on arterial walls during ventricular contraction

• Movement of blood through the vessels - related to SV & HR

• Force that opposes the flow of a fluid

With an increase in blood viscosity there will be an:

• Decrease in peripheral resistance & increase in blood pressure

• Increase in peripheral resistance & decrease in blood pressure

• Increase in peripheral resistance & increase in blood pressure

• Decrease in peripheral resistance & decrease in blood pressure

Tags

NGSS.HS-LS1-3

The length of a blood vessel is directly proportional to its resistance

• True

• False

The longer a blood vessel, the:

• Greater the resistance & lower the blood pressure

• Less the resistance & greater the blood pressure

• Greater the resistance & greater the blood pressure

• Less the resistance & lower the blood pressure

Flow

• The force exerted by blood on arterial walls during ventricular relaxation

• The force exerted by blood on arterial walls during ventricular contraction

• Movement of blood through the vessels - related to SV & HR

• Force that opposes the flow of a fluid

How does an increase in blood vessel diameter affect vascular resistance and blood flow?

• A) Increases resistance and decreases flow

• B) Decreases resistance and increases flow

• C) No change in resistance or flow

• D) Increases both resistance and flow

According to Poiseuille's Law, which factor has the greatest impact on blood flow through a vessel?

• A) Blood vessel length

• B) Blood viscosity

• C) Blood vessel radius

• D) Blood pressure