Blood Vessels Function in Cardiovascular System Quiz

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What is the definition of stroke volume?

The force per unit area that blood exerts against the inside wall of a vessel
The total amount of blood pumped by the heart in one minute
The number of heartbeats per minute
The amount of blood ejected from the heart during each heartbeat (correct)

How is cardiac output calculated?

By dividing stroke volume by heart rate
By adding stroke volume and heart rate
By subtracting heart rate from stroke volume
By multiplying stroke volume by heart rate (correct)

What is the definition of preload?

The ability of a blood vessel to expand and contract in response to changes in pressure
The stretch of the heart wall due to the load to which a cardiac muscle is subjected before shortening (correct)
The volume of blood in the ventricle at the end of rest immediately prior to contraction
The resistance in the arteries to the ejection of blood from the heart

What is the definition of afterload?

The resistance in the arteries to the ejection of blood from the heart (A) Signup and view all the answers

What is the definition of resistance?

The force per unit area that blood exerts against the inside wall of a vessel (B) Signup and view all the answers

What is the definition of compliance?

The ability of a blood vessel to expand and contract in response to changes in pressure (D) Signup and view all the answers

What is the primary function of the heart in the continuous process of blood circulation?

To pump blood through its chambers (B) Signup and view all the answers

Where does the flow of blood through the heart begin?

In the right atrium (D) Signup and view all the answers

What happens to the blood after it flows from the right atrium into the right ventricle?

The blood is pumped through the pulmonary semilunar valve into the pulmonary trunk (C) Signup and view all the answers

What happens to the blood after being oxygenated in the lungs?

The blood enters the left atrium (D) Signup and view all the answers

What is the final destination of the oxygenated blood pumped by the left ventricle?

The systemic cells of the body (B) Signup and view all the answers

How does the blood complete the circulation?

The oxygenated blood returns to the heart through the superior and inferior vena cava (C) Signup and view all the answers

What is the primary function of arteries in the cardiovascular system?

Transporting blood away from the heart (C) Signup and view all the answers

What is the primary function of capillaries in the cardiovascular system?

Facilitating the exchange of gases and nutrients between the blood and the systemic cells in the body (A) Signup and view all the answers

What is the primary function of the right side of the heart?

Receiving deoxygenated blood from the body and pumping it to the lungs for oxygenation (B) Signup and view all the answers

What is the primary function of the left side of the heart?

Receiving oxygenated blood from the lungs and pumping it to the systemic cells of the body (B) Signup and view all the answers

What is the function of the right auricle in the right atrium?

It is a wrinkled, flap-like extension that helps facilitate the exchange of gases and nutrients. (A) Signup and view all the answers

What is the function of the pulmonary semilunar valve in the right side of the heart?

It is positioned between the right ventricle and the pulmonary trunk. (B) Signup and view all the answers

What is the role of baroreceptors in the body?

Regulating systemic blood pressure (A) Signup and view all the answers

How does the body respond to an acute increase in blood pressure?

Increasing heart rate and stroke volume (C) Signup and view all the answers

What is the purpose of myogenic response in maintaining normal blood flow?

Cause vasoconstriction in response to decreased stretch (C) Signup and view all the answers

Which division of the autonomic nervous system is involved in adjusting blood pressure?

Sympathetic division (B) Signup and view all the answers

What is the function of vasoactive chemicals in regulating local blood flow?

Cause vasoconstriction or vasodilation in response to changing metabolic activity (D) Signup and view all the answers

When moving from laying down to standing, what happens to the distribution of blood?

Shifts towards the lower extremities due to gravitational forces (C) Signup and view all the answers

What is the primary purpose of the mechanisms that maintain adequate blood flow when transitioning from lying down to standing?

To prevent a drop in blood pressure (C) Signup and view all the answers

What is the name of the instrument used to measure blood pressure?

Sphygmomanometer (C) Signup and view all the answers

What is the source of the Korotkoff sounds heard during blood pressure measurement?

The flow of blood through the constricted artery (B) Signup and view all the answers

What does the first Korotkoff sound indicate?

Systolic blood pressure (D) Signup and view all the answers

What does the disappearance of the Korotkoff sounds indicate?

Diastolic blood pressure (B) Signup and view all the answers

What is the definition of turbulence in the context of blood flow?

The disruption of smooth blood flow within the blood vessels (A) Signup and view all the answers