Cardiovascular System Composition and Functions Quiz
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Questions and Answers

Which gas constitutes the highest percentage in the alveolar air?

  • Nitrogen (correct)
  • Carbon dioxide
  • Total gas
  • Oxygen
  • What is the main function of hemoglobin in the blood?

  • To transport carbon dioxide
  • To increase blood pH
  • To carry oxygen (correct)
  • To regulate respiratory rate
  • What is the main source of energy for muscle contraction?

  • Calcium
  • Glucose
  • Lactic acid
  • ATP (correct)
  • Which theory explains Delayed Onset Muscle Soreness (DOMS) as a result of microscopic damage to muscle fibers?

    <p>The torn tissue theory</p> Signup and view all the answers

    What is the functional unit of a skeletal muscle fiber?

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

    Which nervous system division is responsible for 'rest and digest' functions?

    <p>The parasympathetic nervous system</p> Signup and view all the answers

    What is the primary function of sensory or afferent neurons?

    <p>To transmit signals from sensory receptors to the central nervous system</p> Signup and view all the answers

    What is the term for the junction between a motor neuron and a muscle fiber?

    <p>Neuromuscular junction</p> Signup and view all the answers

    Which component is responsible for transmitting signals from one neuron to another?

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

    What structure in the alveoli facilitates the exchange of gases between air and blood?

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

    What is the term for the volume of blood ejected by the heart in one contraction?

    <p>Cardiac output</p> Signup and view all the answers

    Which term refers to the maximum volume of blood that the ventricle can hold during diastole?

    <p>Stroke volume</p> Signup and view all the answers

    What is the pressure exerted by blood against the walls of arteries during ventricular contraction called?

    <p>Systolic pressure</p> Signup and view all the answers

    Which term refers to the period of relaxation and filling of the heart chambers?

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

    What is the term for the amount of blood ejected from the left ventricle in one contraction?

    <p>Ejection fraction</p> Signup and view all the answers

    Which term refers to the maximum amount of oxygen that an individual can utilize during intense exercise?

    <p>VO2 Max</p> Signup and view all the answers

    What is the term for the process by which blood is distributed to various body tissues based on their metabolic needs?

    <p>Auto-regulation</p> Signup and view all the answers

    Which term refers to the volume of blood pumped by either ventricle of the heart per minute?

    <p><strong>Caridac output</strong></p> Signup and view all the answers

    The Frank-Starling mechanism is related to the relationship between which two cardiovascular parameters?

    <p><strong>Stroke volume</strong> and <strong>end-diastolic volume</strong></p> Signup and view all the answers

    Which term refers to the process by which oxygen moves from the air into the blood and carbon dioxide moves from the blood into the air in the lungs?

    <p>The respiratory membrane</p> Signup and view all the answers

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