20 Questions
What is the formula for calculating cardiac output (CO) according to the text?
CO = SV * HR
Which factor can increase HR by shortening repolarization according to the text?
Increasing calcium ions
What is the normal stroke volume for a 150 lbs individual based on the information provided?
70 ml
How is ejection fraction (EF) calculated according to the information given?
EF = SV / EDV
What is the term used to describe the difference between maximum cardiac output (CO) and resting CO?
Cardiac Reserve
Which neural stimulation decreases heart rate by releasing acetylcholine?
Parasympathetic stimulation
Where is the heart located in the body?
Between the lungs in the mediastinum
Which statement is true about the pericardium?
It separates the heart from other structures
What is the size of the heart compared to a human's body part?
The size of a fist
Which type of athletes are likely to experience cardiac hypertrophy?
Aerobic athletes
What is the function of the pulmonary circuit?
To let the blood get oxygen
Which chamber of the heart expels blood?
Ventricles
What is the function of the atrioventricular valves in the heart?
Prevent backflow from the ventricles into the atria
Where are the papillary muscles located and what is their function?
In the ventricles, preventing backflow by pulling on chordae tendineae
What is the role of the SA node in the heart?
Establishing the cardiac rhythm
Which element is responsible for causing the action potential (electrical current) in cardiac muscle?
Sodium (Na)
During which phase of the cardiac cycle do semilunar valves close and atrioventricular valves remain closed?
Isovolumic ventricular relaxation
What is the name for the volume of blood left in the heart that didn't get pumped out?
End systolic volume
What does an EKG with 10 electrodes provide that an EKG with fewer electrodes does not?
Better diagnosis of cardiac problems
What is the function of intercalated discs in cardiac muscle cells?
Hold muscle cells together and allow ion flow between cells
Test your knowledge on the anatomy and function of the human heart. Learn about its location, size, and the role it plays in circulating blood through the body.
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