24 Questions
What is the primary function of the cardiovascular system?
To supply the body with nutrients and oxygen
Which component of the blood vessels is responsible for carrying blood away from the heart?
Arteries
What is the composition of plasma in the blood?
91.5% water, 7% proteins
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
Which component of blood is responsible for the stoppage of bleeding?
Platelets
Which of the following is NOT a disorder of erythrocytes?
Leukaemia
What is the main function of blood vessels in the circulatory system?
Transport of nutrients and waste products
Which layer of a generalised blood vessel is responsible for regulating blood flow and blood pressure?
Tunica Media
In which type of blood vessel are valves present to prevent backflow of blood?
Veins
What is the main function of the heart in the circulatory system?
Driving force for blood flow
What is the main function of the sinoatrial (SA) node in the heart?
Initiating action potentials that spread throughout the intrinsic conduction system
What is the average duration of a complete cardiac cycle?
0.8 seconds
What is the relationship between blood pressure and the elasticity of large arteries?
High elasticity helps maintain blood pressure within normal limits
Which factor contributes to maintaining blood pressure within normal limits by regulating blood volume?
Amount of blood circulating
What is the purpose of the Purkinje fibers in the heart's intrinsic conduction system?
Triggering ventricular contraction by conducting action potential upwards
What happens to blood flow in individual tissues according to their immediate needs?
It increases according to tissue oxygen demand
Which layer of the heart wall is composed of cardiac muscle tissue, blood vessels, and nerves?
Myocardium
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
Which circulatory pathway involves blood going to the air sacs (alveoli) of the lungs?
Pulmonary circulation
What is the function of the intrinsic conduction system in the heart?
Regulates the rate and strength of heart contraction
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
What is the function of the intrinsic conduction system of the heart?
Regulating the rate and strength of contraction
Which circulatory pathway involves blood going to the air sacs (alveoli) of the lungs?
Pulmonary circulation
What is the main role of the endocardium in the heart?
Coating internal surfaces and small blood vessels, and heart valves
Learn about the integration of the body through the cardiovascular system and its role in providing nutrients and oxygen to the muscles. Understand how it facilitates the movement of nutrients and fat stores to cells for energy production.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
