Lab Report Example | Topics and Well Written Essays - 750 words

Lab Report Example Since human beings’ absorption of caffeine is high in the morning hours , I carried out the experiment between 7 am and 9 am in the morning (Schmid-Holmes, 2001). I carried out the experiment in our home where we have controlled temperatures maintained at 37 degrees Celsius. I used six out of the ten members of our family who are on one month leave from work with an age bracket of between 30 and 50 years. Hypothesis Caffeine affects blood pressure. Materials and methods. To begin this experiment I wrote a research proposal and had it approved by my instructor. I randomly selected six of the ten members of our family with age between 30 and 50 and who have never been diagnosed with blood pressure. I organized them in two groups of three and ensured that each group has at least one member of the opposite sex. Using an electronic scale, I measured each member of the experiment mass just to be sure that their mass falls around the 68 kg mark. I used a coffee pot to prepare coffee and three cups to serve the prepared coffee, every day for two weeks. I used the other three cups to serve regular, every day for two weeks. ... Then, I prepared the amount of water with caffeine that I used for the experiment. On average, an adult weighs 68 kgs and the recommended caffeine dosage is 200 mg (Monroe, 1998). Since a cup of coffee contains approximately 200 mg of caffeine, I administered one cup of coffee every day for seven days for the first three marked persons(Nawrot, 2003). 1 hour after taking the coffee treatment, I used the sphygmomanometer to measure their blood pressure level and recorded it in the data collection sheet every day. I also measured and recorded the blood pressure of the other three persons who were on regular water. In the second week, I took off the caffeine solution from the marked persons and put them in 100 ml of regular water through day 1 to day 7. I also removed the unmarked persons from regular water and put them on the caffeine treatment. Just like in the first week, I allowed the persons to be served with water with caffeine, a 24 – hour habituation period before starting the test. As I did in the first week, 1 hour after taking the coffee treatment, I used the sphygmomanometer to measure their blood pressure level and recorded it in the data collection sheet every day. I also measured and recorded the blood pressure of the other three persons who were on regular water. Results This experiment showed that the average blood pressure of human beings on the caffeine solutions was slightly higher than the blood pressure of human beings on the regular water (Figure 1).  Ã‚   WEEK ONE MEASUREMENTS WEEK TWO MEASUREMENTS Trial in days Mean Arterial Pressure Trial in days Mean Arterial Pressure 1 2 3 4 5 6 1 2 3 4 5 6 2 97 96 98 93 93 93 2 93 93 93 98 97 97 3 97 97 97 93 93 93 3 93 94 93 99