2 3. FIGURE P21.36 FIGURE 21.31 BIO The potential difference between the electrodes changes as the heart beats. (а) (b) (c) (d) The record of the potential difference between the two electrodes is the electrocardiogram. AV = V2 – V1 Atrial depolarization Septal depolarization Ventricular depolarization Electrode 10 Electrode 2 1. The potential differences at a, b, and c correspond to those measured in the three stages shown to the left. V2– Vị is positive. V2- Vị is negative. V2– Vị is positive.
2 3. FIGURE P21.36 FIGURE 21.31 BIO The potential difference between the electrodes changes as the heart beats. (а) (b) (c) (d) The record of the potential difference between the two electrodes is the electrocardiogram. AV = V2 – V1 Atrial depolarization Septal depolarization Ventricular depolarization Electrode 10 Electrode 2 1. The potential differences at a, b, and c correspond to those measured in the three stages shown to the left. V2– Vị is positive. V2- Vị is negative. V2– Vị is positive.
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Three electrodes, 1–3, are attached to a patient as shown in P21.36. During ventricular depolarization (see 21.31), across which pair of electrodes is the magnitude of the potential difference likely to be the smallest? Explain.
Transcribed Image Text:2
3.
FIGURE P21.36
Transcribed Image Text:FIGURE 21.31 BIO The potential difference between the electrodes changes as the heart beats.
(а)
(b)
(c)
(d)
The record of the potential
difference between the two
electrodes is the
electrocardiogram.
AV = V2 – V1
Atrial depolarization
Septal depolarization
Ventricular depolarization
Electrode 10
Electrode 2
1.
The potential differences at
a, b, and c correspond to
those measured in the three
stages shown to the left.
V2– Vị is positive.
V2- Vị is negative.
V2– Vị is positive.
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