Question

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: