The Cardiovascular System (Part 1)
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Questions and Answers

Which of the following best describes the cardiovascular system?

  • A system that pumps air throughout the body
  • A series of organs that filter waste from the blood
  • A collection of muscles that help with digestion
  • A network of roads and vehicles for blood (correct)

Where is the heart located in the body?

  • In the thoracic cavity, behind the spine
  • In the mediastinum, between the lungs (correct)
  • In the abdominal cavity, near the stomach
  • In the pelvic region, below the bladder

Which side of the heart receives blood that's rich in oxygen?

  • Both sides
  • The left side (correct)
  • Neither side
  • The right side

Which layer of the heart is responsible for pumping blood to the rest of the body?

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

What is the function of the atria in the heart?

<p>To receive blood from the body and lungs (B)</p> Signup and view all the answers

Which chamber of the heart has the thickest wall muscle?

<p>Left ventricle (B)</p> Signup and view all the answers

What is the function of the cardiac valves in the heart?

<p>To control the flow of blood (A)</p> Signup and view all the answers

During the newborn's first breath, what happens to the foramen ovale and ductus arteriosus?

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

Why is it important for the blood to no longer bypass the lungs after the newborn's first breath?

<p>To ensure proper oxygenation of the newborn's blood (B)</p> Signup and view all the answers

What would happen if too much blood were to flow through the fetal lungs?

<p>The lungs would be overwhelmed (C)</p> Signup and view all the answers

Which of the following is NOT a function of the heart's skeleton?

<p>Preventing electrical signals from crossing between the atria and ventricles (A)</p> Signup and view all the answers

What is the purpose of the nerves that connect to the heart?

<p>To control the beating rate of the heart (A)</p> Signup and view all the answers

What happens during systole?

<p>The heart muscles contract (B)</p> Signup and view all the answers

Which of the following is true about veins?

<p>Veins have one-way valves that ensure blood flows in the correct direction (B)</p> Signup and view all the answers

Which of the following is true about pulse?

<p>Pulse can vary in terms of regularity and strength (A)</p> Signup and view all the answers

What is the main purpose of an electrocardiography (ECG or EKG)?

<p>To record the electrical activity of the heart (A)</p> Signup and view all the answers

How does the fetus receive oxygen supply?

<p>From the umbilical vein connected to the placenta (D)</p> Signup and view all the answers

Which of the following is true about the 'Dub' sound of the heart?

<p>It occurs when the ventricles contract (C)</p> Signup and view all the answers

What is ventricular systole?

<p>The phase when the ventricles contract (D)</p> Signup and view all the answers

What is valvular insufficiency?

<p>When the heart valves don't close properly (B)</p> Signup and view all the answers

How is cardiac output (CO) calculated?

<p>CO = SV × HR (C)</p> Signup and view all the answers

Which of the following best describes the function of the cardiovascular system?

<p>Transporting oxygen and nutrients to the body's cells (C)</p> Signup and view all the answers

What is the purpose of the veins in the cardiovascular system?

<p>To carry deoxygenated blood back to the heart (C)</p> Signup and view all the answers

Where is the heart located in the body?

<p>In the thoracic cavity (C)</p> Signup and view all the answers

Which chamber of the heart receives blood that is rich in oxygen?

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

What is the main function of the aorta in the heart?

<p>To carry blood away from the heart (A)</p> Signup and view all the answers

What is the function of the atria in the heart?

<p>To receive blood from the body and lungs (C)</p> Signup and view all the answers

Which side of the heart receives blood that's rich in oxygen?

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

What is the purpose of the cardiac valves in the heart?

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

Which of the following is true about the function of capillaries in the cardiovascular system?

<p>Capillaries exchange important substances like oxygen and nutrients. (C)</p> Signup and view all the answers

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

<p>Arteries carry blood away from the heart to different parts of the body. (A)</p> Signup and view all the answers

What determines the cardiac output (CO) in the cardiovascular system?

<p>Stroke Volume (SV) and Heart Rate (HR) (D)</p> Signup and view all the answers

What is the function of veins in the cardiovascular system?

<p>Veins carry deoxygenated blood towards the heart (A)</p> Signup and view all the answers

What is the purpose of the SA (Sinoatrial) node in the cardiovascular system?

<p>To control the heart rate and act as a natural pacemaker. (A)</p> Signup and view all the answers

Which of the following is true about the blood supply to the fetus?

<p>The fetus receives its oxygen supply from the mother's blood. (B)</p> Signup and view all the answers

What is the purpose of the foramen ovale and ductus arteriosus in a baby's heart before birth?

<p>To bypass the lungs and allow blood to flow directly to the body. (A)</p> Signup and view all the answers

What is the function of the P wave in an electrocardiogram (ECG or EKG)?

<p>It represents the electrical activity when the atria contract. (D)</p> Signup and view all the answers

What is the purpose of repolarization in the heart's rhythm?

<p>To reset the heart's electrical activity for the next heartbeat. (A)</p> Signup and view all the answers

Which of the following is true about the function of the cardiac valves in the heart?

<p>The valves help regulate blood flow by opening and closing in response to pressure changes (A)</p> Signup and view all the answers

What is the primary function of the skeleton of the heart?

<p>Supporting the heart's muscle (myocardium) (A)</p> Signup and view all the answers

What is the purpose of the nerves that connect to the heart?

<p>To make the heart beat faster during exercise and slower during rest (A)</p> Signup and view all the answers

Which of the following is true about the cardiac conduction system?

<p>It is a network of special cells that send electrical signals to make the heart beat in a coordinated way (B)</p> Signup and view all the answers

What happens during diastole in the cardiac cycle?

<p>The atria and ventricles relax (A)</p> Signup and view all the answers

What happens when the newborn takes its first breath and inflates the lungs?

<p>The foramen ovale and ductus arteriosus close (C)</p> Signup and view all the answers

What would happen if too much blood were to flow through the fetal lungs?

<p>The lungs would become damaged (B)</p> Signup and view all the answers

What happens to the mother and baby's blood after the closure of the foramen ovale and ductus arteriosus?

<p>The mother and baby's blood no longer mix/meet (A)</p> Signup and view all the answers

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