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Questions and Answers

What is the primary function of hemoglobin in erythrocytes?

  • To regulate blood pressure
  • To maintain body temperature
  • To transport nutrients to body tissues
  • To facilitate the reversible binding of oxygen and carbon dioxide (correct)
  • What is the normal approximate hematocrit percentage in healthy men?

  • 45% (correct)
  • 38%
  • 48%
  • 42%
  • Which part of the heart is responsible for the flow of blood to the lungs?

  • Right atrium
  • Left atrium
  • Right ventricle (correct)
  • Left ventricle
  • What role do the semilunar valves play in the heart?

    <p>They prevent blood from flowing back into the ventricles during diastole</p> Signup and view all the answers

    Which valve is located between the right atrium and right ventricle?

    <p>Tricuspid valve</p> Signup and view all the answers

    What is the primary composition of the endocardium?

    <p>Endothelial cells and connective tissue</p> Signup and view all the answers

    What is the role of chordae tendinae in the heart?

    <p>To anchor the atrioventricular valves</p> Signup and view all the answers

    During which phase do the atrioventricular valves prevent backflow of blood?

    <p>Ventricular systole</p> Signup and view all the answers

    What is the primary function of the myocardium?

    <p>Contract to pump blood throughout the circulatory system</p> Signup and view all the answers

    Which layer of the heart is directly in contact with the heart muscle?

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

    What role do the gap junctions between cardiac cells serve?

    <p>They allow for rapid spread of action potentials</p> Signup and view all the answers

    What is the primary purpose of the pericardium?

    <p>To anchor the heart to surrounding structures</p> Signup and view all the answers

    Which blood vessel carries blood away from the heart?

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

    Which tunic is the innermost layer of blood vessels?

    <p>Tunica intima</p> Signup and view all the answers

    What is NOT a component of the pacemaker cells' function?

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

    What does the pericardial cavity contain that aids in heart movement?

    <p>Pericardial fluid</p> Signup and view all the answers

    What is the main role of the sinoatrial (SA) node in the heart?

    <p>It generates the action potential that controls heart rate.</p> Signup and view all the answers

    Which part of the heart initiates depolarization spreading throughout the atria?

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

    What is the primary function of gap junctions in cardiac muscle?

    <p>To allow action potentials to spread between cells</p> Signup and view all the answers

    How does the action potential travel from the atria to the ventricles?

    <p>Via the Atrioventricular (AV) node</p> Signup and view all the answers

    What determines the heart rate according to the functioning of the SA node?

    <p>The discharge rate of the SA node</p> Signup and view all the answers

    What is the defined cutoff for a positive exercise test result in exercise-induced bronchospasm?

    <p>A decrease of 15% in FEV1</p> Signup and view all the answers

    How long after exercise should spirometry be performed to assess exercise-induced bronchospasm?

    <p>15-30 minutes after exercise</p> Signup and view all the answers

    Which of the following accurately describes the heart as a dual pump?

    <p>Both sides function independently but pump blood simultaneously.</p> Signup and view all the answers

    What characterizes the conduction system of the heart?

    <p>It includes specialized cardiac cells with low electrical resistance.</p> Signup and view all the answers

    Which of the following conditions is NOT known to mimic asthma?

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

    What is the sequence of contraction in the heart's pumping action?

    <p>Atria contract first followed by ventricles.</p> Signup and view all the answers

    In asthma management, what characterizes a 'Well-Controlled' patient?

    <p>Has minimal or no symptoms and low reliance on rescue medication</p> Signup and view all the answers

    What is a common method used by clinicians to evaluate asthma control?

    <p>Asthma Control Test (ACT) or Asthma Control Questionnaire (ACQ)</p> Signup and view all the answers

    What defines an 'Uncontrolled' asthma patient?

    <p>Frequent symptoms and high use of rescue inhalers</p> Signup and view all the answers

    Which factor does NOT contribute to asthma control assessment?

    <p>Dietary habits</p> Signup and view all the answers

    What is typically expected in lung function for a 'Partially Controlled' asthma patient?

    <p>Lung function reduced compared to personal best</p> Signup and view all the answers

    What is one of the non-pharmacological treatment strategies for managing symptoms in patients with interstitial lung disease (ILD)?

    <p>Identifying and removing environmental triggers</p> Signup and view all the answers

    In the context of advanced ILD, what role does palliative care serve?

    <p>To alleviate symptoms and improve comfort</p> Signup and view all the answers

    When might lung transplantation be considered for patients with ILD?

    <p>In patients who are physically and psychologically robust</p> Signup and view all the answers

    What is the primary focus of supplemental oxygen therapy in patients experiencing hypoxia due to ILD?

    <p>To significantly improve symptoms</p> Signup and view all the answers

    Which pharmacological treatment can be used for rapidly progressive non-IPF ILDs?

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

    What is a common underlying medical issue that should be addressed in patients with ILD?

    <p>Autoimmune diseases</p> Signup and view all the answers

    What can structured pulmonary rehabilitation programs provide for patients with ILD?

    <p>Exercise training and education</p> Signup and view all the answers

    What might characterize type 1 respiratory failure related to fibrosis progression?

    <p>Hypoxemia without hypercapnia, with normal PaCO2</p> Signup and view all the answers

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