Place a single word into each sentence to make it correct. Not all terms will be used. Electric currents in the heart can be detected by means of ____ applied to the skin. An instrument called the electrocardiograph ____ these signals and produces a record on a moving paper chart. The chart includes three principle deflections above and below the baseline; the P wave, QRS complex, and the ____ wave. The P wave is produced when a signal from the SA node spreads through the atria and ____ them. The QRS complex is produced when the signal from the AV node spreads through the ____ myocardium and depolarizes the muscle. The T wave is generated by ventricular repolarization immediately before ____
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Step 1: Identify that this is a fill-in-the-blank exercise about the electrical activity of the heart and electrocardiograms where we need to place words from the left column into the blank spaces in the sentences on the right. Show more…
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Complete each sentence by dragging the labels to the appropriate blanks. Then place each sentence in a logical order beginning with the sinoatrial node. The SA node fires, causing the signal to travel into the atrioventricular node located in the inferior interatrial septum. From the AV node, the signal passes through the bundle of His located in the superior portion of the posterior atrial wall. Depolarization of the bundle of His leads to the activation of the Purkinje fibers. Making a U-turn at the apex of the heart, the signals are then carried by the Purkinje fibers through the exterior walls of the ventricles. The depolarization wave spreads through the ventricles, causing them to contract.
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Conduction System Complete each sentence by dragging the labels to the appropriate blanks. Then place each sentence in a logical order beginning with blood entering the right side of the heart. Drag the text blocks below into their correct order. The contraction of the heart begins with autorhythmic depolarization of the sinoatrial node located in the superior portion of the posterior atrial wall. From the sinoatrial node, the wave of depolarization disperses through the myocardium of the atria. Depolarization then arrives at the atrioventricular node located in the inferior interatrial septum. The AV node fires, causing the signal to travel into the AV bundle branches as it passes through the interventricular septum. Making a U-turn at the apex of the heart, the signals are then carried by the Purkinje fibers through the exterior walls of the ventricles.
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