Podcast
Questions and Answers
What is the relationship between blood flow (F) and resistance (R)?
What is the relationship between blood flow (F) and resistance (R)?
- Blood flow is directly proportional to resistance.
- Blood flow is indirectly proportional to resistance.
- Blood flow is inversely proportional to resistance. (correct)
- Blood flow is not affected by resistance.
What factor is resistance (R) directly proportional to?
What factor is resistance (R) directly proportional to?
- Vessel radius to the power of 4
- Vessel length
- Blood viscosity (correct)
- Hematocrit
How does increased Hematocrit affect blood flow?
How does increased Hematocrit affect blood flow?
- Decreases blood flow (correct)
- Increases blood flow
- Causes chaotic blood flow
- Does not affect blood flow
Which of the following factors affects the resistance in a vessel?
Which of the following factors affects the resistance in a vessel?
What does cardiac output equal in relation to systemic circulation?
What does cardiac output equal in relation to systemic circulation?
How is blood viscosity compared to water (H2O)?
How is blood viscosity compared to water (H2O)?
What is the main trigger for the continuous generation of blood flow?
What is the main trigger for the continuous generation of blood flow?
How do vasodilator drugs affect the arterial blood pressure?
How do vasodilator drugs affect the arterial blood pressure?
Which vasodilator drug induces strong vasoconstriction, especially in veins?
Which vasodilator drug induces strong vasoconstriction, especially in veins?
What effect does Prostacyclin (PGI2) have on blood vessels?
What effect does Prostacyclin (PGI2) have on blood vessels?
How does autoregulation of blood flow to tissues respond to changes in arterial blood pressure?
How does autoregulation of blood flow to tissues respond to changes in arterial blood pressure?
What effect do vasoconstrictors like Endothelins have on blood vessels?
What effect do vasoconstrictors like Endothelins have on blood vessels?
What is the main molecular mechanism of vasodilators?
What is the main molecular mechanism of vasodilators?
How does vascular smooth muscle respond to stretch?
How does vascular smooth muscle respond to stretch?
Which of the following is NOT a vasodilator?
Which of the following is NOT a vasodilator?
What is the advantage of partial contraction of vascular smooth muscle?
What is the advantage of partial contraction of vascular smooth muscle?
Which molecule has a short physiological half-life of a few seconds?
Which molecule has a short physiological half-life of a few seconds?
What causes the opening of ion channels in vascular smooth muscle?
What causes the opening of ion channels in vascular smooth muscle?
