Functions of the Cardiovascular System

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What is the primary function of the cardiovascular system?

To produce hormones for the body

To regulate body temperature

To remove waste products from the body

To supply the body with nutrients and oxygen (correct)

Which component of the blood vessels is responsible for carrying blood away from the heart?

Capillaries

Arteries (correct)

Red and white blood cells

Veins

What is the composition of plasma in the blood?

91.5% water, 7% proteins (correct)

80% water, 20% red and white blood cells

30% water, 70% proteins

50% water, 50% formed elements

What is the role of blood vessels at the surface of the skin in the cardiovascular system?

To regulate heat loss through constriction and dilation Signup and view all the answers

Which component of blood is responsible for the stoppage of bleeding?

Platelets Signup and view all the answers

Which of the following is NOT a disorder of erythrocytes?

Leukaemia Signup and view all the answers

What is the main function of blood vessels in the circulatory system?

Transport of nutrients and waste products Signup and view all the answers

Which layer of a generalised blood vessel is responsible for regulating blood flow and blood pressure?

Tunica Media Signup and view all the answers

In which type of blood vessel are valves present to prevent backflow of blood?

Veins Signup and view all the answers

What is the main function of the heart in the circulatory system?

Driving force for blood flow Signup and view all the answers

What is the main function of the sinoatrial (SA) node in the heart?

Initiating action potentials that spread throughout the intrinsic conduction system Signup and view all the answers

What is the average duration of a complete cardiac cycle?

0.8 seconds Signup and view all the answers

What is the relationship between blood pressure and the elasticity of large arteries?

High elasticity helps maintain blood pressure within normal limits Signup and view all the answers

Which factor contributes to maintaining blood pressure within normal limits by regulating blood volume?

Amount of blood circulating Signup and view all the answers

What is the purpose of the Purkinje fibers in the heart's intrinsic conduction system?

Triggering ventricular contraction by conducting action potential upwards Signup and view all the answers

What happens to blood flow in individual tissues according to their immediate needs?

It increases according to tissue oxygen demand Signup and view all the answers

Which layer of the heart wall is composed of cardiac muscle tissue, blood vessels, and nerves?

Myocardium Signup and view all the answers

What is the primary role of the pericardium in relation to the heart?

Protects and confines the heart to its position while allowing movement for contraction Signup and view all the answers

Which circulatory pathway involves blood going to the air sacs (alveoli) of the lungs?

Pulmonary circulation Signup and view all the answers

What is the function of the intrinsic conduction system in the heart?

Regulates the rate and strength of heart contraction Signup and view all the answers

What is the role of the pericardium in relation to the heart?

It surrounds and protects the heart, confining it to its position while allowing freedom of movement for contraction Signup and view all the answers

What is the function of the intrinsic conduction system of the heart?

Regulating the rate and strength of contraction Signup and view all the answers

Which circulatory pathway involves blood going to the air sacs (alveoli) of the lungs?

Pulmonary circulation Signup and view all the answers

What is the main role of the endocardium in the heart?

Coating internal surfaces and small blood vessels, and heart valves Signup and view all the answers

Functions of the Cardiovascular System

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Questions and Answers

What is the primary function of the cardiovascular system?

Which component of the blood vessels is responsible for carrying blood away from the heart?

What is the composition of plasma in the blood?

What is the role of blood vessels at the surface of the skin in the cardiovascular system?

Which component of blood is responsible for the stoppage of bleeding?

Which of the following is NOT a disorder of erythrocytes?

What is the main function of blood vessels in the circulatory system?

Which layer of a generalised blood vessel is responsible for regulating blood flow and blood pressure?

In which type of blood vessel are valves present to prevent backflow of blood?

What is the main function of the heart in the circulatory system?

What is the main function of the sinoatrial (SA) node in the heart?

What is the average duration of a complete cardiac cycle?

What is the relationship between blood pressure and the elasticity of large arteries?

Which factor contributes to maintaining blood pressure within normal limits by regulating blood volume?

What is the purpose of the Purkinje fibers in the heart's intrinsic conduction system?

What happens to blood flow in individual tissues according to their immediate needs?

Which layer of the heart wall is composed of cardiac muscle tissue, blood vessels, and nerves?

What is the primary role of the pericardium in relation to the heart?

Which circulatory pathway involves blood going to the air sacs (alveoli) of the lungs?

What is the function of the intrinsic conduction system in the heart?

What is the role of the pericardium in relation to the heart?

What is the function of the intrinsic conduction system of the heart?

Which circulatory pathway involves blood going to the air sacs (alveoli) of the lungs?

What is the main role of the endocardium in the heart?

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