Unit 7 review

Which of the following conditions would most likely increase blood flow through the human body?

• An increase in blood viscosity

• A decrease in blood volume

• An increase in blood pressure

• A buildup of plaque in the arteries

How does the buildup of fatty deposits in arteries (atherosclerosis) affect blood flow?

• Decreases blood pressure and increases flow

• . Increases the elasticity of artery walls

• Decreases blood viscosity and speeds up flow

• Increases resistance and reduces blood flow

What would be the likely result of a severe drop in blood volume due to dehydration?

• Decreased blood pressure and slower blood flow

• Increased blood flow and reduced pressure

• Decreased blood viscosity and increased flow

• Increased oxygen delivery to tissues

Tags

NGSS.HS-LS1-3

Which statement best describes the effect of high blood viscosity on the cardiovascular system?

• It increases blood pressure and oxygen delivery.

• . It increases resistance and decreases blood flow.

• It decreases resistance and increases blood flow.

• It decreases blood pressure and increases resistance.

Tags

NGSS.HS-LS1-3

During intense physical activity, how does the cardiovascular system respond to meet the body’s increased oxygen demands?

• Heart rate increases and more blood is pumped to muscles.

• Blood vessels constrict and blood flow slows.

• Blood volume decreases and resistance increases.

• Heart rate decreases and blood pressure drops.

Tags

NGSS.HS-LS1-3

Which of the following would most likely result in decreased blood flow?

• Low blood pressure and low resistance

• High blood volume and low resistance

• High blood viscosity and narrow blood vessels

• Wide blood vessels and low blood viscosity

Which of the following correctly matches a factor with its effect on blood flow?

• Decreased resistance → slower blood flow

• . Increased blood viscosity → faster blood flow

• . Decreased blood volume → increased blood pressure

• Increased blood pressure → faster blood flow

Increase in viscosity causes

• The heart must work harder to pump blood.

• Blood flows more quickly through the arteries.

• Heart rate slows to maintain balance.

• Oxygen delivery to tissues increases.

Which condition would most likely increase the resistance to blood flow in the circulatory system?

• Decreased blood volume

• Narrowing of blood vessels due to plaque buildup

• Lowered blood viscosity

• Increased elasticity of blood vessel walls

Why does high cholesterol negatively impact blood flow?

• It lowers blood viscosity

• It contributes to plaque buildup that narrows blood vessels

• It increases the elasticity of veins

• . It causes the heart to beat slower