22 Questions
What is the formula for cardiac output?
Stroke volume * heart rate
How do deep breaths affect heart murmurs?
Deep breaths amplify heart murmurs
What is the normal stroke volume for a 150 lbs. individual?
70 ml
What is ejection fraction?
(End diastolic volume - end systolic volume) / end diastolic volume
How does sympathetic stimulation affect heart rate?
Increases heart rate
What is the role of the medulla oblongata in controlling heart rate?
Increases heart rate through the cardiac accelerator nerves
Where is the heart located in the human body?
Between the lungs in the thoracic cavity
Which statement about atria and ventricles is correct?
Atria receive blood while ventricles expel blood
What is the function of the pulmonary circuit?
To let blood get oxygen
Which layer surrounds the heart and is also the innermost layer of pericardium?
Epicardium (visceral layer of serous pericardium)
What is the role of veins in the cardiovascular system?
Carry blood back to the heart
Which statement about arteries is true?
Pulmonary arteries carry oxygenated blood
What prevents backflow from arteries back into ventricles in the heart?
Semilunar valves
Which component in the heart contracts to prevent backflow by pulling the 'Heart Strings'?
Papillary muscles
Where is the SA node located in the heart?
Right atrium
What is the function of conducting cells in the heart?
Allow action potential to move through the heart
Which element causes the action potential (electrical current) in the heart?
Na, Ca, K
What does the T wave represent in an electrocardiogram (EKG)?
Repolarization of ventricles
What is the significance of the end diastolic volume in the heart?
Amount of blood that can be pumped out
'Lub' sound heard through a stethoscope is associated with which event in the heart cycle?
Closing of atrioventricular valves
'Dub' sound heard through a stethoscope is associated with which event in the heart cycle?
Opening of semilunar valves
Which chamber is the last one blood moves through before being ejected into the systemic circuit?
Left ventricle
Test your knowledge on the anatomy and function of the human heart, including its location, size, and role in the circulatory system. Learn about the pericardium, base, and apex of the heart, as well as the impact of aerobic exercise on heart size.
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