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 (B)</p> Signup and view all the answers

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

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

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

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

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

<p>Decreased contractility (A)</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 (A)</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 (C)</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 (D)</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 (B)</p> Signup and view all the answers

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

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

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

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

What does systolic pressure represent in a blood pressure reading?

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

What does diastolic pressure represent in a blood pressure reading?

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

What is pulse pressure?

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

What is MAP (Mean Arterial Pressure)?

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

What is the main purpose of the tongue twister?

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

Which hormone is responsible for promoting red blood cell production?

<p>EPO (B)</p> Signup and view all the answers

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

<p>ACTH (A)</p> Signup and view all the answers

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

<p>Oxytocin (D)</p> Signup and view all the answers

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

<p>TSH (D)</p> Signup and view all the answers

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

<p>Leptin (B)</p> Signup and view all the answers

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

<p>ANP (D)</p> Signup and view all the answers

Which hormone is responsible for increasing blood pressure?

<p>Angiotensin (A)</p> Signup and view all the answers

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

<p>Calcitonin (A)</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 (A)</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 (C)</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 (D)</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 (B)</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 (A)</p> Signup and view all the answers

Which hormone is lipophilic and can cross the cell membrane?

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

Which hormone is responsible for regulating metabolism?

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

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

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

Which hormone is released by the adrenal gland?

<p>Testosterone (D)</p> Signup and view all the answers

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