BIOC32H3 : Electricity and electrophysiology summary
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Analyze the following experimental data. Note that during the experiment resting blood pressure and pulse were taken for the subjects. Following a 3 minute sitting rest period, the subject was then asked to stand motionless for 12 minutes, during which time blood pressure and pulse were taken every 3 minutes. Immediately following the 12 minute stand period, the subject was asked to complete 20 moderately paced steps on a low chair and then to sit in the resting position. Following the 20 steps and for two more minutes, pulse and blood pressure were recorded for the subject. Using the data below, answer the following questions:
| 3 min. sit | Time | Heart Rate | Systolic BP | Diastolic BP | Pulse Pressure | Estimated Cardiac Output |
| 0 | 66 | 120 | 75 | |||
| 3 | 78 | 120 | 70 | |||
| 12 min. stand with no movement | 6 | 108 | 120 | 90 | ||
| 9 | 112 | 120 | 95 | |||
| 12 | 116 | 125 | 100 | |||
| 15 | 120 | 130 | 105 | |||
| 20 steps Sit and Rest | 17 | 104 | 135 | 85 | ||
| 19 | 92 | 125 | 90 | |||
| 21 | 76 | 120 | 80 |
1. Explain the trend in Cardiac Output throughout the experiment and give a physiological explanation for the trend:
2. Explain the trend in pulse pressure throughout the experiment and give a physiological explanation for the trend:
3. Explain the trend in heart rate throughout the experiment and give a physiological explanation for the trend:
4. Explain the trend in blood pressure throughout the experiment and give a physiological explanation for the trend:
