Circulatory System Lecture 6
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Questions and Answers

Which circuit carries deoxygenated blood from the heart to the lungs?

  • Systemic circuit (correct)
  • Cardiac circuit
  • Pulmonary circuit
  • Coronary circuit

Which blood vessel carries oxygenated blood from the lungs to the heart?

  • Pulmonary artery
  • Aorta
  • Vena cava
  • Pulmonary vein (correct)

Which component of the heart induces both atria to contract?

  • SA node (correct)
  • Ventricles
  • Pacemaker
  • AV node

What is the function of valves in veins?

<p>Prevent backflow (B)</p> Signup and view all the answers

During which phase of the cardiac cycle do the ventricles contract?

<p>Systole (D)</p> Signup and view all the answers

What is the primary function of the pulmonary circuit?

<p>Oxygenate blood (C)</p> Signup and view all the answers

Which blood vessel carries deoxygenated blood from the heart to the lungs?

<p>Pulmonary artery (D)</p> Signup and view all the answers

What is the role of the AV node in the heart?

<p>Induces both ventricles to contract (D)</p> Signup and view all the answers

What is the function of the systemic circuit?

<p>Supply oxygenated blood to the body tissues (D)</p> Signup and view all the answers

What is the main function of the circulatory system?

<p>To distribute materials throughout the body (B)</p> Signup and view all the answers

Which component is part of the cardiovascular system?

<p>Blood vessels (C)</p> Signup and view all the answers

What is the function of red blood cells (RBC) in the blood?

<p>Bind and transport oxygen molecules (D)</p> Signup and view all the answers

Where do capillaries function as sites of chemical exchange?

<p>With the blood to form capillary beds (C)</p> Signup and view all the answers

Which blood vessels carry blood away from the heart to capillaries?

<p>Arteries (D)</p> Signup and view all the answers

What is the function of the ventricles in the heart?

<p>Where blood exits the heart (B)</p> Signup and view all the answers

What type of muscle is the human heart mainly composed of?

<p>Cardiac muscle (D)</p> Signup and view all the answers

How many times does blood pass through the heart in double circulation?

<p>Twice (C)</p> Signup and view all the answers

What is the main function of platelets in the blood?

<p>Cell fragments involved in blood clotting (A)</p> Signup and view all the answers

What are the three major components of the cardiovascular system?

<p>Blood, blood vessels, heart (B)</p> Signup and view all the answers

Which blood vessel carries blood away from the heart to capillaries?

<p>Arteries (D)</p> Signup and view all the answers

What is the main function of red blood cells (RBC) in the blood?

<p>Bind and transport oxygen molecules (D)</p> Signup and view all the answers

What is the function of the ventricles in the heart?

<p>Pump blood through the blood vessels by muscular action (D)</p> Signup and view all the answers

What is the role of the AV node in the heart?

<p>To relay electrical impulses to the ventricles (C)</p> Signup and view all the answers

What is the function of valves in veins?

<p>Prevent backflow of blood (B)</p> Signup and view all the answers

What type of muscle is the human heart mainly composed of?

<p>Cardiac muscle (A)</p> Signup and view all the answers

What is the primary function of the pulmonary circuit?

<p>Carries deoxygenated blood from the heart to the lungs (C)</p> Signup and view all the answers

Where do capillaries function as sites of chemical exchange?

<p>Capillary beds (C)</p> Signup and view all the answers

What is the function of the SA node in the heart?

<p>Regulates the timing of muscular contractions (C)</p> Signup and view all the answers

What is the primary function of the pulmonary circuit?

<p>To oxygenate blood (D)</p> Signup and view all the answers

What is the role of the AV node in the heart?

<p>Induces both ventricles to contract (D)</p> Signup and view all the answers

Where does gas exchange primarily occur in the respiratory system?

<p>Between the blood and the environment or body (C)</p> Signup and view all the answers

What is the main function of the systemic circuit?

<p>To carry blood to the body tissues (A)</p> Signup and view all the answers

What is the function of valves in veins?

<p>To prevent backflow of blood (C)</p> Signup and view all the answers

What is the function of the ventricles in the heart?

<p>To pump blood into the aorta (A)</p> Signup and view all the answers

What is the function of the capillaries in the respiratory system?

<p>To facilitate gas exchange (A)</p> Signup and view all the answers

What is the main function of the circulatory system?

<p>To transport oxygen and nutrients to cells (D)</p> Signup and view all the answers

What is the function of the SA node in the heart?

<p>Regulates the timing of muscular contractions (D)</p> Signup and view all the answers

What is the primary function of the pulmonary circuit?

<p>To oxygenate blood and remove CO2 (C)</p> Signup and view all the answers

What is the role of the AV node in the heart?

<p>Induces both ventricles to contract (A)</p> Signup and view all the answers

Where do capillaries function as sites of chemical exchange?

<p>Between the blood and the body tissues (D)</p> Signup and view all the answers

What is the function of the systemic circuit?

<p>To carry blood to the body tissues and pick up CO2 (C)</p> Signup and view all the answers

Which blood vessel carries deoxygenated blood from the heart to the lungs?

<p>Pulmonary artery (C)</p> Signup and view all the answers

What is the function of the ventricles in the heart?

<p>To pump blood into the aorta and pulmonary arteries (D)</p> Signup and view all the answers

What is the main function of the capillaries of the lungs?

<p>To facilitate gas exchange (D)</p> Signup and view all the answers

What is the main function of the AV node in the heart?

<p>Induces both ventricles to contract (B)</p> Signup and view all the answers

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