39 Questions
Where does pulmonary circulation begin and end?
Right heart and left heart
Which component of the vascular tree has the highest cross-sectional area?
Aorta
What is the main function of capillaries?
Nutrient exchange
Which component of the vascular tree collects blood from capillaries?
Venules
Which component of the vascular tree serves as a conduit for blood transport back to the heart?
Veins
What is the main function of the arterial system?
Control of blood flow
What is the main function of the venous system?
High volume blood storage
Which of the following statements accurately describes the arterial system?
High pressure, low volume, high compliance
Why is the venous system considered high compliance (capacitance)?
Ability to stretch and accommodate changes in blood volume
Which of the following is true about the compliance of the arterial and venous systems?
The venous system has higher compliance than the arterial system
Which of the following is a common symptom of anemia in the gums?
Whiter shade
What is the purpose of antibiotic prophylaxis before invasive dental procedures for individuals with anemia?
To prevent possible infection risk
Which method measures blood flow by utilizing the generation of electromotive force in blood moving through a magnetic field?
Electromagnetic flowmeter
What is the main reason for the high compliance (capacitance) of the venous system?
High volume
Which equation represents Ohm's Law for blood flow?
$F = \Delta P \times R$
What effect does dilation of blood vessels have on blood flow?
Increases blood flow
What effect does constriction of blood vessels have on blood flow?
Decreases blood flow
What happens to vascular resistance when pressure increases?
Vascular resistance decreases
What causes changes in blood flow?
Changes in sympathetic nerve stimulation
What effect does increased sympathetic nerve stimulation have on blood flow?
Decreases blood flow
According to the Poiseuille Law, which factor has the greatest impact on resistance to blood flow in a vessel?
Radius
Which of the following is true about laminar flow?
Each layer of blood remains the same distance from the wall
What is the relationship between blood flow and resistance in a vessel according to the Poiseuille Law?
Blood flow is inversely proportional to resistance
Which of the following factors is the most sensitive to changes in resistance?
Radius
What is the equation for blood flow according to the Poiseuille Law?
$F = \Delta P / R$
What is the equation for total peripheral resistance (Rtotal) in the circulatory system?
$Rtotal = 1/R1 + 1/R2$
What is the measure of the tendency for turbulence to occur in blood flow according to Reynolds' number (Re)?
Flow velocity
According to the 4th power Law, how does a 4-fold increase in vessel diameter affect resistance and blood flow?
Resistance decreases by a factor of 16 and blood flow increases by a factor of 256
What is the equation for blood flow according to Ohm's Law?
$F = \Delta P / R$
Where is the pressure lowest in the vascular tree?
Veins
Which of the following is true about resistance beds in parallel?
They offer less resistance compared to beds in series
Which of the following statements accurately describes the venous system?
Low pressure, low volume, high compliance
What is the goal of the circulatory system?
Deliver nutrients and remove wastes
Which of the following statements accurately describes the regulation of blood flow to each tissue?
Blood flow to each tissue is always precisely controlled in relation to tissue needs.
Which of the following accurately describes the control of cardiac output?
Cardiac output is controlled mainly by the sum of all the local tissue flows.
Which of the following accurately describes the control of arterial pressure?
Arterial pressure is controlled independently of local blood flow control or cardiac output.
Which of the following factors determines blood flow through a vessel?
Blood pressure
What is the relationship between blood flow and resistance in a vessel?
Blood flow is inversely proportional to resistance
What is the main determinant of resistance to blood flow in a vessel?
Vessel diameter
Test your knowledge on the mechanics of circulation and blood flow in the body with this quiz! Explore the components and functions of the circulatory system, including the pulmonary circulation and the different types of blood vessels.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
