Electrical Conduction Through the Heart Quiz
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Questions and Answers

Which of the following equations represents the cardiac output (CO)?

  • CO = SV x HR (correct)
  • CO = SV / HR
  • CO = SV + HR
  • CO = SV - HR

    • Which of the following equations represents the stroke volume (SV)?

  • SV = EDV + ESV
  • SV = EDV / ESV
  • SV = EDV x ESV
  • SV = EDV - ESV (correct)

    • Which of the following factors can increase the cardiac output (CO)?

  • Decreased heart rate (HR)
  • Increased end diastolic volume (EDV) (correct)
  • Increased end systolic volume (ESV)
  • Decreased stroke volume (SV)

    • Which of the following factors can increase the end diastolic volume (EDV)?

    <p>Increased filling time</p> Signup and view all the answers

    Which of the following factors can increase the end systolic volume (ESV)?

    <p>Increased afterload</p> Signup and view all the answers

    Which of the following factors can decrease the end diastolic volume (EDV)?

    <p>Decreased filling time</p> Signup and view all the answers

    Which of the following factors can decrease the end systolic volume (ESV)?

    <p>Decreased contractility</p> Signup and view all the answers

    Which node in the heart generates the action potential that initiates the contraction of the atria and serves as the pacemaker?

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

    Which fibers in the heart are activated by the AV node and cause a bottom-up contraction of the ventricles?

    <p>Purkinje fibers</p> Signup and view all the answers

    What is the major difference between a normal action potential and a cardiac action potential?

    <p>Calcium influx during repolarization</p> Signup and view all the answers

    Which wave in an ECG corresponds to the electrical activity from the Purkinje fibers up, causing the ventricles to contract?

    <p>QRS complex</p> Signup and view all the answers

    What does the 'Lub' sound heard during a blood pressure measurement represent?

    <p>Closing of AV valves</p> Signup and view all the answers

    What does the 'Dub' sound heard during a blood pressure measurement represent?

    <p>Closing of semilunar valves</p> Signup and view all the answers

    What does systolic pressure represent in a blood pressure reading?

    <p>Heart contracting</p> Signup and view all the answers

    What does diastolic pressure represent in a blood pressure reading?

    <p>Heart relaxing</p> Signup and view all the answers

    What is pulse pressure?

    <p>Difference between systolic and diastolic pressure</p> Signup and view all the answers

    What is MAP (Mean Arterial Pressure)?

    <p>Average pressure of the heart</p> Signup and view all the answers

    According to the famous tongue twister, how much wood can a woodchuck chuck if a woodchuck could chuck wood?

    <p>None of the above</p> Signup and view all the answers

    What is the main purpose of the tongue twister?

    <p>To entertain with a difficult phrase</p> Signup and view all the answers

    What does the phrase 'if a woodchuck could chuck wood' imply?

    <p>Woodchucks are capable of chucking wood</p> Signup and view all the answers

    Which hormone is responsible for promoting red blood cell production?

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

    Which hormone is released by the pituitary gland and regulates cortisol levels?

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

    Which hormone is responsible for increasing contraction during labor and lactation during breastfeeding?

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

    Which hormone is released by the pituitary gland and stimulates the thyroid gland?

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

    Which hormone is responsible for regulating body weight and is released by 'fat cells'?

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

    Which hormone is responsible for lower blood pressure and targets the kidneys?

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

    Which hormone is responsible for increasing blood pressure?

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

    Which hormone is responsible for controlling the level of calcium in the blood?

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

    Which hormone is released by the pancreas when blood sugars are high and stores sugar in the liver and muscles?

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

    Which hormone is released by the pancreas when blood sugars are low and releases sugars from the liver?

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

    Which hormone is responsible for decreasing blood calcium levels by promoting calcium deposition into the bone?

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

    Which hormone is responsible for increasing blood calcium levels by releasing calcium from the bones?

    <p>Parathyroid hormone</p> Signup and view all the answers

    Which hormone is released by the pineal gland and regulates sleep, and is influenced by light?

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

    Which hormone is lipophilic and can cross the cell membrane?

    <p>Thyroid hormone</p> Signup and view all the answers

    Which hormone is responsible for regulating metabolism?

    <p>Thyroid hormone</p> Signup and view all the answers

    Which hormone is released by the pituitary gland and is regulated by TSH?

    <p>Thyroid hormone</p> Signup and view all the answers

    Which hormone is released by the adrenal gland?

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

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