Human Heart Anatomy and Function

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What is the term used to describe both S3 and S4 heart sounds being heard simultaneously?

S5

S3S4

S7 (correct)

Duotricuspid

Which factor can amplify heart murmurs?

Blood pressure

Breathing deep (correct)

Body temperature

Heart rate

What is the formula for calculating cardiac output?

CO = SV / HR

CO = SV - HR

CO = SV * HR (correct)

CO = SV + HR

What does the ejection fraction represent?

The percentage of blood pumped out of the heart during each contraction Signup and view all the answers

How does parasympathetic stimulation affect heart rate?

Decreases heart rate Signup and view all the answers

What causes an increase in heart rate due to hypoxia?

Lack of oxygen Signup and view all the answers

Where is the heart located in the body?

Between the lungs in the thoracic cavity Signup and view all the answers

What is the function of the pericardium?

Separates the heart from other structures Signup and view all the answers

Which statement about arteries is correct?

Arteries always carry blood away from the heart Signup and view all the answers

What is the function of the pulmonary circuit?

To allow blood to get oxygen Signup and view all the answers

Which layer surrounds the heart and is also the innermost layer of pericardium?

Epicardium Signup and view all the answers

What separates the chambers of the heart?

Three septa: right atrioventricular, left atrioventricular, and interventricular septa Signup and view all the answers

What are the two atrioventricular valves in the heart responsible for preventing backflow?

Bicuspid and tricuspid valves Signup and view all the answers

Which chamber of the heart is responsible for receiving blood continuously from the pulmonary circuit?

Left atrium Signup and view all the answers

What is the function of the papillary muscles in the heart?

To prevent backflow by contracting Signup and view all the answers

Where is the SA node located in the heart?

Superior and posterior aspect of right atrium Signup and view all the answers

What is the name for the phase where the ventricles contract but no blood enters or leaves?

Isometric contraction Signup and view all the answers

Which element causes the action potential (electrical current) in cardiac muscle cells?

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

What is the name for the amount of blood that is pumped out by the heart in one contraction?

Stroke volume Signup and view all the answers

'Lub' sound heard through auscultation of the heart corresponds to which event in the cardiac cycle?

Closing of atrioventricular valves (S1) Signup and view all the answers

'Dub' sound heard through auscultation of the heart corresponds to which event in the cardiac cycle?

'P' wave on EKG Signup and view all the answers

What is the function of desmosomes in the intercalated disc of cardiac muscle cells?

Hold muscle cells together Signup and view all the answers

Human Heart Anatomy and Function

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Questions and Answers

What is the term used to describe both S3 and S4 heart sounds being heard simultaneously?

Which factor can amplify heart murmurs?

What is the formula for calculating cardiac output?

What does the ejection fraction represent?

How does parasympathetic stimulation affect heart rate?

What causes an increase in heart rate due to hypoxia?

Where is the heart located in the body?

What is the function of the pericardium?

Which statement about arteries is correct?

What is the function of the pulmonary circuit?

Which layer surrounds the heart and is also the innermost layer of pericardium?

What separates the chambers of the heart?

What are the two atrioventricular valves in the heart responsible for preventing backflow?

Which chamber of the heart is responsible for receiving blood continuously from the pulmonary circuit?

What is the function of the papillary muscles in the heart?

Where is the SA node located in the heart?

What is the name for the phase where the ventricles contract but no blood enters or leaves?

Which element causes the action potential (electrical current) in cardiac muscle cells?

What is the name for the amount of blood that is pumped out by the heart in one contraction?

'Lub' sound heard through auscultation of the heart corresponds to which event in the cardiac cycle?

'Dub' sound heard through auscultation of the heart corresponds to which event in the cardiac cycle?

What is the function of desmosomes in the intercalated disc of cardiac muscle cells?

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