21 Questions
What does a murmur indicate?
Cardiac hypertrophy
Which neurotransmitter is responsible for decreasing heart rate?
Acetylcholine
What factor contributes to an increase in stroke volume?
Increased calcium ions
What is the normal range for pH that affects heart rate?
7.35 - 7.45
Which of the following factors will lead to an increase in heart rate?
Hyperthermia
What is the target heart rate range for receiving maximum benefit from aerobic exercise?
130 - 150 BPM
Where is the heart located in the body?
Between the lungs in the mediastinum
Which statement about the pulmonary circuit is true?
It lets blood get oxygen
What separates the heart from other structures?
Pericardium
How many chambers does the heart have?
4 chambers, 2 atria and 2 ventricles
What is the function of arteries in relation to the heart?
Carry oxygenated blood away from the heart
Which statement accurately describes cardiac hypertrophy?
Aerobic athletes will see more of this
What prevents backflow from occurring in the heart?
Semilunar valves
Which structure prevents the electrical impulse from going straight to the ventricles?
AV node
What cells make up 99% of the myocardium and are responsible for contraction?
Myocardial contracting cells
Which valve is responsible for preventing backflow in the left side of the heart?
Mitral valve
What is the function of papillary muscles in the heart?
Pull chordae tendineae
What is the purpose of using an electrocardiogram (EKG) in diagnosing cardiac problems?
To detect heart rhythm abnormalities
Which phase of the cardiac cycle involves the contraction of the ventricles to pump blood?
Systole
Where is the SA node located in the heart?
Right atrium
'Lub' sound during auscultation of the heart is associated with:
'Lub' is closing of atrioventricular valves
Test your knowledge on the anatomy and function of the human heart. Learn about the structure, position, and characteristics of the heart as well as its role in the circulatory system.
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