Human Heart Anatomy and Function

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What is the formula for calculating cardiac output (CO)?

CO = ESV + HR

CO = SV / HR

CO = EDV - ESV

CO = SV * HR (correct)

Which nerve is responsible for decreasing heart rate through the release of acetylcholine?

Cardiac accelerator nerves

Phrenic nerve

Vagus nerve (CN X) (correct)

Sympathetic nerve

What is the normal stroke volume for a 150 lbs. individual?

100 ml

70 ml (correct)

50 ml

120 ml

What does an increase in calcium ions do to heart rate?

Increases heart rate Signup and view all the answers

What does the limbic system influence in relation to heart rate?

Emotions affecting heart rate Signup and view all the answers

What does altered amounts of sodium (NA) and potassium (K) affect in the body?

Heart rate Signup and view all the answers

Where is the heart located in the body?

In the mediastinum between the lungs Signup and view all the answers

Which type of athletes are more likely to exhibit cardiac hypertrophy?

Aerobic athletes Signup and view all the answers

Which statement about the pericardium is correct?

There is fluid between the visceral and parietal layers of the pericardium Signup and view all the answers

What is the function of arteries in the circulatory system?

To transport blood from the lungs to the body Signup and view all the answers

Which septum separates the right atrium from the right ventricle?

Right atrioventricular septum Signup and view all the answers

What is the function of pulmonary veins in circulation?

To distribute oxygenated blood throughout the body Signup and view all the answers

What is the function of the semilunar valves in the heart?

Prevent backflow from arteries back into ventricles Signup and view all the answers

Where are the papillary muscles located in the heart?

In the ventricles Signup and view all the answers

Which component establishes the cardiac rhythm in the heart?

SA node Signup and view all the answers

What element(s) cause the action potential (electrical current) in cardiac muscle cells?

Na, Ca, and K Signup and view all the answers

When does the T wave occur in the cardiac cycle?

During ventricular relaxation Signup and view all the answers

What is the end diastolic volume of the heart approximately?

~130 ml Signup and view all the answers

What initiates atrial contraction in the heart?

SA node activation Signup and view all the answers

What causes the closing sound 'Dub' in heart auscultation?

'Dub' sound due to closing of semilunar valves (S2) Signup and view all the answers

Which chamber in the heart is responsible for pumping blood into the systemic circuit?

Left ventricle Signup and view all the answers

During which phase do semilunar valves close and atrioventricular valves remain closed in the heart's cycle?

Isovolumic ventricular relaxation Signup and view all the answers

Human Heart Anatomy and Function

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Questions and Answers

What is the formula for calculating cardiac output (CO)?

Which nerve is responsible for decreasing heart rate through the release of acetylcholine?

What is the normal stroke volume for a 150 lbs. individual?

What does an increase in calcium ions do to heart rate?

What does the limbic system influence in relation to heart rate?

What does altered amounts of sodium (NA) and potassium (K) affect in the body?

Where is the heart located in the body?

Which type of athletes are more likely to exhibit cardiac hypertrophy?

Which statement about the pericardium is correct?

What is the function of arteries in the circulatory system?

Which septum separates the right atrium from the right ventricle?

What is the function of pulmonary veins in circulation?

What is the function of the semilunar valves in the heart?

Where are the papillary muscles located in the heart?

Which component establishes the cardiac rhythm in the heart?

What element(s) cause the action potential (electrical current) in cardiac muscle cells?

When does the T wave occur in the cardiac cycle?

What is the end diastolic volume of the heart approximately?

What initiates atrial contraction in the heart?

What causes the closing sound 'Dub' in heart auscultation?

Which chamber in the heart is responsible for pumping blood into the systemic circuit?

During which phase do semilunar valves close and atrioventricular valves remain closed in the heart's cycle?

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