Electrical Signals and the ECG

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Which chambers of the heart are synchronized to contract simultaneously?

Left ventricle and right ventricle

Left atrium and left ventricle

Left atrium and right atrium (correct)

Right atrium and right ventricle

Where does the right atrium receive blood from?

The left atrium

The lungs

The left ventricle

The body (correct)

Where does the right ventricle pump the blood to?

The lungs (correct)

The body

The left atrium

The left ventricle

What moves the blood from the left atrium to the left ventricle?

The contraction of the left atrium Signup and view all the answers

What initiates the depolarization of the nerves and muscles of the atria?

The sinoatrial (SA) node Signup and view all the answers

Which part of the heart generates the electrical potentials measured by the electrocardiogram (ECG)?

The atrial depolarization and contraction Signup and view all the answers

What is the record of the heart's potentials on the skin called?

Electrocardiogram (ECG) Signup and view all the answers

Which electrical event of the normal heart cycle is represented by the P wave in an ECG?

The atrial depolarization and contraction Signup and view all the answers

What controls the heartbeat at a frequency of 30 to 50 beats per minute if the normal SA node signal is not conducted into the ventricle?

The AV node Signup and view all the answers

Which electrical event of the normal heart cycle is represented by the QRS complex in an ECG?

The ventricular depolarization Signup and view all the answers

Electrical Signals and the ECG

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Questions and Answers

Which chambers of the heart are synchronized to contract simultaneously?

Where does the right atrium receive blood from?

Where does the right ventricle pump the blood to?

What moves the blood from the left atrium to the left ventricle?

What initiates the depolarization of the nerves and muscles of the atria?

Which part of the heart generates the electrical potentials measured by the electrocardiogram (ECG)?

What is the record of the heart's potentials on the skin called?

Which electrical event of the normal heart cycle is represented by the P wave in an ECG?

What controls the heartbeat at a frequency of 30 to 50 beats per minute if the normal SA node signal is not conducted into the ventricle?

Which electrical event of the normal heart cycle is represented by the QRS complex in an ECG?

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