Human Heart Function and Anatomy

Play an AI-generated podcast conversation about this lesson

Where is the heart located in the body?

At the base of the skull

In the abdominal cavity

Near the kidneys

Between the lungs in the mediastinum (correct)

What separates the heart from other structures?

Endocardium

Epicardium

Myocardium

Pericardium (correct)

Which part of the heart is superior and medial to the apex?

Base (correct)

Pericardium

Endocardium

Epicardium

What type of athletes may have noticeably larger hearts?

Aerobic athletes Signup and view all the answers

Which vessels always carry blood away from the heart?

Arteries 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 is the formula for cardiac output?

CO = SV * HR Signup and view all the answers

Which factor can amplify heart murmurs?

Deep breathing Signup and view all the answers

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

$70$ ml Signup and view all the answers

What is the target heart rate for aerobic exercise?

120 - 160 BPM Signup and view all the answers

How do epinephrine and norepinephrine contribute to heart function?

Increase contractility Signup and view all the answers

What is the primary role of the medulla oblongata in heart rate regulation?

Control HR through the vagus nerve Signup and view all the answers

Which valves are responsible for preventing backflow from arteries back into ventricles?

Semilunar valves Signup and view all the answers

Where is the SA node located in the heart?

In the right atrium Signup and view all the answers

What causes the action potential (electrical current) in cardiac muscle?

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

Which component of the heart is responsible for holding muscle cells together?

Intercalated disc Signup and view all the answers

During which phase does the ventricles contract and blood tries to go back into the atria?

Isovolumic ventricular relaxation Signup and view all the answers

What is the function of papillary muscles in the ventricles?

To pull the chordae tendineae Signup and view all the answers

What occurs during the T wave on an EKG?

Ventricular repolarization Signup and view all the answers

What is the purpose of an electrocardiogram (EKG) in diagnosing cardiac problems?

To diagnose electrical activity of the heart Signup and view all the answers

What do you hear during auscultation of the heart's sounds with a stethoscope?

All heart sounds including S1, S2, and S3 Signup and view all the answers