Biomedical Engineering Chapter 2: Cardiac Cycle Calculation Quiz
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Questions and Answers

Which of the following represents the volume of blood in the ventricle at the end of diastole?

  • End-diastolic volume (correct)
  • End-systolic volume
  • Stroke volume
  • Cardiac output

    • In the cardiac cycle, what term refers to the volume of blood in the ventricle at the end of systole?

  • Stroke volume
  • Cardiac output
  • End-systolic volume (correct)
  • End-diastolic volume

    • Which term describes the amount of blood pumped by each ventricle in one minute?

  • End-diastolic volume
  • Cardiac output (correct)
  • End-systolic volume
  • Stroke volume

    • What does an Electrocardiogram (ECG or EKG) measure?

    <p>Electrical activity of the heart</p> Signup and view all the answers

    What is the term for the volume of blood ejected from the heart with each contraction?

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

    Which term describes the percentage of blood pumped out of the ventricle during each heartbeat?

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

    What happens to stroke volume when end-systolic volume increases?

    <p>It decreases</p> Signup and view all the answers

    In terms of the cardiac cycle, what does end-diastolic volume represent?

    <p>Volume of blood in the ventricle at the end of diastole</p> Signup and view all the answers

    What is cardiac output a measure of in relation to heart function?

    <p>Amount of blood pumped by each ventricle per minute</p> Signup and view all the answers

    What happens during the repolarization phase of an action potential?

    <p>Sodium channels are inactivated, potassium channels open, and the membrane cannot depolarize again</p> Signup and view all the answers

    What is the primary function of neurotransmitters in chemical synapses?

    <p>To convert electrical energy to chemical energy and then back to electrical energy</p> Signup and view all the answers

    Which of the following best describes the process of neurotransmitter release at the presynaptic terminal?

    <p>Vesicles containing neurotransmitters move to the synapse and release their contents via exocytosis</p> Signup and view all the answers

    What is the primary mechanism by which an action potential propagates along an axon without decreasing in amplitude?

    <p>An all-or-none signal that does not decrease in amplitude</p> Signup and view all the answers

    What is the primary role of vesicles in the presynaptic terminal?

    <p>To store and release neurotransmitters in response to action potentials</p> Signup and view all the answers

    Which of the following best describes the process of synaptic transmission?

    <p>Neurotransmitters are released, diffuse across the synaptic gap, and elicit a response in the postsynaptic cell</p> Signup and view all the answers

    What is the primary function of the synaptic gap in chemical synapses?

    <p>To facilitate the diffusion of neurotransmitters from the presynaptic to postsynaptic terminal</p> Signup and view all the answers

    What is the primary mechanism by which neurotransmitters elicit a response in the postsynaptic cell?

    <p>By binding to specific receptors on the postsynaptic membrane</p> Signup and view all the answers

    Which of the following is not a step in the process of synaptic transmission?

    <p>Neurotransmitters are actively transported back into the presynaptic terminal</p> Signup and view all the answers

    What is the primary advantage of the all-or-none nature of action potentials propagating along an axon?

    <p>It provides an effective signaling method over large distances without decreasing in amplitude</p> Signup and view all the answers

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