Introduction
For this experiment, the goal was to establish whether or not increased CO2 production would affect the time it took for the BTB to turn from blue to yellow when blown into. Bromothymol blue reacts with acidic substances, and since that is exactly what CO2 is, a reaction occurs. Based on this information, it would make sense that when you exercise, CO2 production increases and the BTB would be exposed to more of it therefore increasing the speed of the reaction. Students’ task was to exercise and monitor changes in the reaction time of the BTB. The exercise is believed to increase CO2 levels in the body through elevated cellular respiration. Cellular respiration is the process cells go through to create energy, which is scientifically
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Although there was not significant change, it was there. Since having exactly 5 drops of BTB and 5 millilters of water in the test tube each time was nearly impossible, there is potential that the inconsistency skewed the results.
Discussion
As predicted, the time it took for the bromothymol blue to turn to yellow decreased after more amounts of exercise. The subjects heart rates increased the more they ran up and down stairs as the body needed to use the bloodstream to bring more oxygen to the muscles. To let your bloodstream provide more oxygen, the heart begins beating hard and fast (“New Health Advisor”, 2016) to move blood quicker. This concludes the hypothesis that the time will decrease due to more CO2 being released. The data showed more average decrease in the times in the females rather than the males. This could be a variety of things, but based on what was observed it is fairly reasonable to suspect those factors on stamina. There are athletic girls, but on average males seem to naturally have more endurance. SInce that is the case, they have an easier time with breath as they would not have to work quite as hard. As less oxygen is being brought to the muscles, more is being exhaled, so it would take more breath to release a decent amount of CO2 to change the color of the BTB.
the replicate shows the same trend as the first experiment. I used a measuring cylinder and a beaker to measure out the amounts of water; however these did not seem to affect the quality of my results. To increase the accuracy of my results I could have perhaps used a burette. Even though I did the best I could to keep the experiment accurate, I did. some places there were mistakes that unintentionally occurred.
The experiment studies the effects of Red Bull and its major components on the heart rate of a Daphnia. The experiment focuses on the effects of conditions on the cardiovascular system. The Cardiovascular system is responsible for the transport of blood, oxygen, nutrients and waste circulating the body. It consists of the heart, vessels, and blood as in closed circulatory system and hemolymph in open circulatory system, the cardiovascular system is also responsible for thermoregulation in the body. (Gonzalez, 2012). The heart helps pump blood to the lungs and rest of the body. The pumping of heart or the contraction and relaxation of heart determines the heart rate and depends on multiple chemicals that we could influence by using stimulants, depressants, varying temperatures, aerobic, and anaerobic
In this lab, we explored the theory of maximal oxygen consumption. “Maximal oxygen uptake (VO2max) is defined as the highest rate at which oxygen can be taken up and utilized by the body during severe exercise” (Bassett and Howley, 2000). VO2max is measured in millimeters of O2 consumed per kilogram of body weight per min (ml/kg/min). It is commonly known as a good way to determine a subject’s cardio-respiratory endurance and aerobic fitness level. Two people whom are given the same aerobic task (can both be considered “fit”) however, the more fit individual can consume more oxygen to produce enough energy to sustain higher, intense work loads during exercise. The purpose of this lab experiment was performed to determine the VO2max results of a trained vs. an untrained participant to see who was more fit.
In the study it was hypothesized, that the pulse rate does not increase after a step test exercise. This hypothesis is not valid because the result of the step test proves otherwise. In the study, the individuals who participated in the step test took their pulse rates before and after the step test, looking at the overall results, figures and the averages of both tests, we can conclude that the step test exercise does affect the pulse rate of an individual.
McKenzie, D. C. (2012). Respiratory physiology: Adaptations to high-level exercise. British Journal of Sports Medicine, 46(6), 381. doi:10.1136/bjsports-2011-090824
The purpose of this particular experiment was to conclude which part of the fly thorax cell homogenate carries out glycolysis and which part carries out respiration. Methylene blue was the only true indicator as to whether glycolysis and respiration occurred. If dissolved oxygen levels were low then the methylene blue would become colorless and bleach. This was the case for four out of the seven test tubes.
•While exercising your lungs tries to increase the intake of oxygen as well as release the carbon dioxide.
Overall, the data collected from this lab supported the hypothesis that even though the 1.5 mile run test will not produce the highest average VO2 max, the results of the 1.5 mile run will produce the most accurate VO2 max results as the test puts more physiological demand on the body compared to the Queens College/McArdle Step Test and the Rockport One Mile Walk Test. Even though theoretically all three of the field tests should have produced the same estimate of aerobic capacity, the three tests produced different results due to various reasons. Since the 1.5 mile run placed the most physiological demands on the body, this test was a better indicator of individual VO2 max. Overall, all three of the field tests proved that males had a higher average VO2 max compared to women. In addition, individuals who are aerobically trained tend to perform better considering these individuals are able to sustain a higher intensity level for a longer amount of
Diet and exercise were the only 2 doable and so my partner and I chose exercise. We determined that as the intensity of an exercise increased, so did the heart rate of the person performing it. Hypothesis – I predict that as the intensity increases during exercise, the heart rate will also increase. I think this is because your body needs oxygen in order to efficiently break down glucose and process it into your cells.
This would give us an extra measure of accuracy each time. Another way to improve the experiment and to produce consistent readings was to used distilled water. This is because the distilled water contains no impurities and therefore no hardness in water.
AIM: - the aim of this experiment is to find out what the effects of exercise are on the heart rate. And to record these results in various formats. VARIABLES: - * Type of exercise * Duration of exercise * Intensity of exercise * Stage of respiration
The two major things that will help an athlete while measuring the cardiovascular drift are progression and hydration levels. The heart rate of an athlete working hard during a workout should be no more than their maximum heart rate which is found by, if you’re a female take 226-age, if you’re a male take 220-age. If while doing a workout the maximum heart rate is exceeded by too much it may be necessary to take a break or slow down greatly. This may also help with traking the hydration of an athlete. If an athlete stays hydrated their core temperature will stay regulated which means they won’t sweat as much, which also means the heart won’t be under as much stress while transporting the oxygenated blood throughout the body to the
Investigating the Effect of Exercise on the Heart Rate Introduction For it's size the heart has the huge capacity of pumping large amounts of blood, in the average adult's heart beats 60 to 100 times a minute, pumps between 70ml and 100ml of blood with each beat, circulates 5 to 6 litres of blood around the body per minute and about 13 litres of blood per minute during vigorous exercise. The heart will beat more then 2.5 billion times during an average lifetime. This investigation will be looking at the effect of exercise on the heart rate. Aim The aim of this investigation is to find out how exercise affects the heart rate, using research & experimenting on changes and increases in the heart rate using exercise. Research â— The heart The normal heart is a strong, hardworking pump made of muscle tissue.
There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.
body has to work harder I think that the heart will then increase at a