Gas Exchange and Oxygen Transportation Quiz
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Questions and Answers

Which layer of the heart is responsible for contracting and pumping blood?

  • Epicardium
  • Pericardium
  • Endocardium
  • Myocardium (correct)

    • Which layer of the heart provides a smooth surface for blood flow and prevents abnormal clotting?

  • Pericardium
  • Myocardium
  • Endocardium (correct)
  • Epicardium

    • Which heart chamber receives deoxygenated blood from the right atrium and pumps it to the lungs for oxygenation?

  • Left ventricle
  • Right atrium
  • Left atrium
  • Right ventricle (correct)

    • Which of the following statements about the coronary circuit is correct?

    <p>The coronary circuit supplies oxygenated blood to the myocardium itself.</p> Signup and view all the answers

    Which of the following statements about cardiac muscle contraction is correct?

    <p>Cardiac muscle contracts involuntarily, synchronously, and continuously without fatiguing.</p> Signup and view all the answers

    Which of the following components of the conduction system initiates each heartbeat and acts as the natural pacemaker?

    <p>Sinoatrial (SA) node</p> Signup and view all the answers

    Which of the following represents ventricular repolarization in a normal electrocardiogram (ECG) tracing?

    <p>T wave</p> Signup and view all the answers

    Which of the following is the primary function of Type I cells in the alveolar wall?

    <p>Facilitate gas exchange</p> Signup and view all the answers

    What is the primary form in which oxygen is carried in the blood?

    <p>Bound to hemoglobin</p> Signup and view all the answers

    Which of the following best describes dyspnea?

    <p>Difficulty or discomfort in breathing</p> Signup and view all the answers

    Where is the respiratory center of the brain located?

    <p>Medulla oblongata</p> Signup and view all the answers

    Which of the following is true about the QT interval?

    <p>It indicates the total time for ventricular depolarization and repolarization.</p> Signup and view all the answers

    What can be indicated by T-wave inversion or ST-segment depression on an ECG tracing?

    <p>Ischemia</p> Signup and view all the answers

    Which heart sound is caused by the closure of the semilunar valves?

    <p>S2</p> Signup and view all the answers

    What is the formula for calculating cardiac output?

    <p>Cardiac Output = Stroke Volume / Heart Rate</p> Signup and view all the answers

    Which of the following is NOT a factor that can contribute to increased peripheral resistance?

    <p>Vasodilation</p> Signup and view all the answers

    Which of the following is true about blood pressure in the circulatory system?

    <p>Blood pressure is highest in arteries</p> Signup and view all the answers

    Which of the following is NOT a short-term neural control of blood pressure?

    <p>Renin-angiotensin-aldosterone system</p> Signup and view all the answers

    Which of the following is the correct formula to calculate Mean Arterial Pressure (MAP)?

    <p>MAP = (2 x diastolic + systolic) / 3</p> Signup and view all the answers

    Which hormone promotes water reabsorption by the kidneys?

    <p>Anti-diuretic hormone (ADH)</p> Signup and view all the answers

    What is the definition of hypertension?

    <p>Persistently high blood pressure</p> Signup and view all the answers

    What is the main function of the conducting zone in the respiratory system?

    <p>Warming, humidifying, and cleansing incoming air</p> Signup and view all the answers

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

    <p>Prevents food and liquid from entering the nasal cavity</p> Signup and view all the answers

    Which of the following correctly describes the flow of blood in pulmonary circulation?

    <p>Right ventricle → pulmonary artery → alveolar capillaries → pulmonary veins → left atrium</p> Signup and view all the answers

    Which of the following correctly describes the flow of blood in systemic circulation?

    <p>Left atrium → left ventricle → aorta → arteries → arterioles → capillaries → venules → veins → right atrium</p> Signup and view all the answers

    Which of the following correctly describes the location and position of the heart in the thoracic cavity?

    <p>The heart is centrally located within the thoracic cavity, in a region known as the mediastinum.</p> Signup and view all the answers

    Which one of these accurately describes the function of the valves in the heart?

    <p>The valves in the heart prevent the backflow of blood and ensure unidirectional flow.</p> Signup and view all the answers

    Which one of these accurately describes the flow of blood in pulmonary circulation?

    <p>Right ventricle → pulmonary artery → alveolar capillaries → pulmonary veins → left atrium</p> Signup and view all the answers

    Which one of these accurately describes the location and position of the heart in the thoracic cavity?

    <p>The heart is centrally located within the thoracic cavity, in a region known as the mediastinum.</p> Signup and view all the answers

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