Cardiovascular System Function Quiz

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What is the main function of the circulatory system?

Transport of gases and waste products

Regulation of body temperature by controlling blood flow to the skin

Defense mechanism by transporting leukocytes and antibodies

All of the above (correct)

Which division of the circulatory system involves the flow of blood from the left ventricle to the aorta, large arteries, arterioles, and capillaries?

Coronary circulation

Peripheral circulation

Systemic circulation (correct)

Pulmonary circulation

What is the function of pulmonary circulation?

Regulation of body temperature

Gas exchange (correct)

Transport of nutrients to the tissues

Defense mechanism against infections

Where does the blood flow in pulmonary circulation?

From the right atrium to the right ventricle then through the pulmonary artery to the lungs Signup and view all the answers

What does the transport function of the circulatory system include?

Transport of O2, CO2, and waste products to and from tissues Signup and view all the answers

How does the circulatory system contribute to maintaining homeostasis?

By controlling blood flow to the skin Signup and view all the answers

What is the function of the atrial muscles?

To regulate arterial blood pressure Signup and view all the answers

Which valve separates the right atrium from the right ventricle?

Tricuspid valve Signup and view all the answers

What is the main function of the semilunar valves?

To allow one-way flow of blood from the ventricles to the aorta and pulmonary arteries Signup and view all the answers

What is the absolute refractory period (A.R.P) of the cardiac muscle?

The period during which excitability is completely lost, and any stimulus cannot excite the cardiac muscle Signup and view all the answers

Which chamber of the heart receives blood from the body through superior and inferior vena cava?

Right atrium Signup and view all the answers

What is excitability in relation to cardiac muscle?

The ability to respond to a stimulus and generate an action potential Signup and view all the answers

What is the left ventricle's wall thickness compared to the right?

Thicker by three times than right ventricle's wall. Signup and view all the answers

When does mechanical contraction of cardiac muscle start?

At the end of plateau phase Signup and view all the answers

What is the function of the tricuspid valve in the heart?

Receives blood from the body through superior and inferior vena cava Signup and view all the answers

During which phase of the cardiac cycle does mechanical contraction (systole) of the cardiac muscle start?

Depolarization phase Signup and view all the answers

What happens during the relative refractory period (RRP) of the cardiac muscle?

Excitability is decreased Signup and view all the answers

What is the main function of the circulatory system?

All of the above Signup and view all the answers

Which chamber of the heart pumps blood to the aorta to reach different organs of the body?

Left ventricle Signup and view all the answers

What is the relation between mechanical response and action potential in the cardiac muscle?

Mechanical response lasts 1.5 times as long as the duration of action potential Signup and view all the answers

During which phase of the cardiac cycle does the supernormal phase of excitability coincide?

Second half of diastole Signup and view all the answers

Which fibers are responsible for conducting the electrical signal generated by the sinoatrial node (SAN)?

Sinoatrial node (SAN), atrioventricular node (A.V.N), and purkinje fibers Signup and view all the answers

What is the speed of transmission in the atrioventricular node (A.V. N)?

$0.02-0.03$ meters/sec Signup and view all the answers

What is the physiological importance of the atrioventricular nodal delay?

Gives a chance for complete ventricular repolarization and adequate ventricular filling Signup and view all the answers

Which factor directly affects the force of myocardial contraction according to Starling's Law?

Initial length of cardiac muscle fibers Signup and view all the answers

Cardiovascular System Function Quiz

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Questions and Answers

What is the main function of the circulatory system?

Which division of the circulatory system involves the flow of blood from the left ventricle to the aorta, large arteries, arterioles, and capillaries?

What is the function of pulmonary circulation?

Where does the blood flow in pulmonary circulation?

What does the transport function of the circulatory system include?

How does the circulatory system contribute to maintaining homeostasis?

What is the function of the atrial muscles?

Which valve separates the right atrium from the right ventricle?

What is the main function of the semilunar valves?

What is the absolute refractory period (A.R.P) of the cardiac muscle?

Which chamber of the heart receives blood from the body through superior and inferior vena cava?

What is excitability in relation to cardiac muscle?

What is the left ventricle's wall thickness compared to the right?

When does mechanical contraction of cardiac muscle start?

What is the function of the tricuspid valve in the heart?

During which phase of the cardiac cycle does mechanical contraction (systole) of the cardiac muscle start?

What happens during the relative refractory period (RRP) of the cardiac muscle?

What is the main function of the circulatory system?

Which chamber of the heart pumps blood to the aorta to reach different organs of the body?

What is the relation between mechanical response and action potential in the cardiac muscle?

During which phase of the cardiac cycle does the supernormal phase of excitability coincide?

Which fibers are responsible for conducting the electrical signal generated by the sinoatrial node (SAN)?

What is the speed of transmission in the atrioventricular node (A.V. N)?

What is the physiological importance of the atrioventricular nodal delay?

Which factor directly affects the force of myocardial contraction according to Starling's Law?

What is the period during which the ventricles contract and force blood out into the aorta and main pulmonary artery called?

What is the volume of blood pumped by each ventricle per minute known as?

What is the function of xanthines like caffeine and theophylline?

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