Corotto, F., Ceballos, D., Lee, A., & Vinson, L. (2010). Making the Most of the Daphnia Heart Rate Lab: Optimizing the Use of Ethanol, Nicotine & Caffeine. The American Biology Teacher , 176-179. The purpose of this article was to test the effects of chemicals on Daphnia magna. Caffeine, Nicotine, ethanol, and a control solution were tested. The heart rate of Daphnia was measured after exposure to each of the chemicals. After testing, it was found that ethanol depressed the heart rate while exposed, but the heart rate stabilized after exposure. With exposure to nicotine, the heart rate increased by 20%. If more nicotine was added, the effects were varied and sometimes irreversible. Caffeine did not have a measurable effect on the heart rate
I tested this experiment by cutting five planarians in half and placing them in the caffeine solution and doing the same for the spring water solution. We placed them in 4 degrees Celsius temperature and waited a week to observe the results. Abstract: The purpose of this experiment was to observe how caffeinated solutions help regenerate planarian growth faster than spring
NEW YORK (WENY) - You often hear you have to guard your heart, but what if your life depended on it. For one local women battling heart disease, her heart beats are numbered. For the past 15 years, Donna Dacey's life has been filled with doctor's appointments, a cabinet full of medication and wondering when she's going to hear the dreaded words "you need a heart transplant." "After a lot of testing they discovered I had dilated cardiomyopathy and congestive heart failure.
If the population of elapsed time intervals until an event occurs is assumed to follow an exponential distribution, implying a constant hazard rate throughout every observation subwindow, the maximum likelihood estimate of that hazard rate is 0.2361, with a standard error of 0.013790. The assumption of an exponential distribution with a constant hazard rate produces an EXTREMELY GOOD fit with the observed data. The analogue of an unadjusted coefficient of determination (R-squared) would be 0.9974. An attempt was made to fit a Weibull distribution to the same data.
HEART COMPLICATION – Caffeine and other ingredients in the energy drinks can increase the heart rate and blood pressure. Caffeine is the ingredient which can influence the heart beat due to the liberate of calcium from the heart cells. Caffeine and other ingredients in the energy drink also increase the blood pressure which can damage the normal balance of salts in the body. These complications can cause many health problems such as arrhythmia, cardiac arrest, hypertension, coronary heart failure, etc. Highly caffeinated energy drinks and energy shots may enhance sports performance and keep someone alert and attentive but the risk of getting too much of caffeine intake can endanger the heart at any age.
A lot of people love sugary foods and drinks. This experiment can be applied to the real world because it shows how something so delicious can affect our overall health exceedingly. Since sugar affects our heart rate and blood pressure in different ways in many peculiar people, there are contrasting affects that can happen to people. For example, sugar can make the human body 's pulse and blood pressure increase or decrease. Both ways can be risky for your health.
Hypotheses: Do you expect heat to be a chronotropic factor? Yes Do you expect heat to be an inotropic factor? Yes Procedure and Results: Control Heart Rate (After rinsing) beats/min Experimental procedure Heart Rate after treatment beats/min Change in Heart Rate beats/min Strength of Contraction after treatment compared to normal (stronger or weaker) Baseline rate: 72 Continuously drop warm Frog Ringer’s onto the heart 48 -24 Weaker Rate after rinsing: 72 Continuously drop cold Frog Ringer’s onto the heart 60 -12 Weaker
There was also no indication the amount of variability biological and psychological factors produced and there was also the potential that negative consequences could have been due to other substances, not caffeine. Ciapparelli et al (2010) also revealed that participants 24.1% of participants with psychiatric disorders were reported to use caffeine
Pediatric interventional cardiology is a passion and a dream which I hope one day to realize. During my first pediatric residency training, I realized the depth of my interest in cardiology. I found pleasure and interest in all the pediatric cardiology rotations; however, cardiac catheterization, despite the limited sophistication with which it was performed, captivated me. As there were no training opportunities available back home and few interventional procedures can be done due to lack of experience in congenital interventional cardiology. Therefore, I decided to pursue a second pediatric residency training in the USA to allow me the opportunity for further training in pediatric cardiology and eventually congenital cardiac intervention.
The graph displays a negatively skewed trend, which suggests that the hypothesis was not supported. This is because the greatest percentage of caffeine (100%) did not result in the greatest reaction time, as predicted. The subjects who drank a 50% caffeinated beverage had the fastest reaction rate, taking an average of 0.39478 seconds to react. Comparatively, the subjects that drank the 100% caffeinated beverage had a slower average reaction time of 0.45917 seconds, taking longer to react. The subjects who were not exposed to any caffeine (0%) had a reaction time of 0.47293 seconds.
The amount of toxins varies widely from plant to plant. As much as a 5:1 variation can be found between plants, and a given plant's toxicity depends on its age, where it is growing, and the local weather conditions. Additionally, within a given Datura plant, toxin concentration varies by part and even from leaf to leaf. When the plant is younger, the ratio of scopolamine to atropine is about 3:1; after flowering, this ratio is reversed, with the amount of scopolamine continuing to decrease as the plant gets older (Preissel et al.,
This challenges the findings from previous studies, for example Mayo Clinic researchers conducted a similar experiment where subject group were given the energy drink and a placebo. The findings indicated a significant rise in blood pressure for those who consumed the energy drink when compared to the placebo group. In addition the effect was most pertinent for those who did not consume caffeine on a regular basis, thus suggesting that energy drinks may increase the risk of cardiac events. Despite the benefits of caffeine, it is important to take into account the detrimental health effects that concurs within the body when consuming. Studies show that in hypertensive individuals, caffeine intake produces an acute increase in blood pressure (BP) for ≥3hours (Mesas AE1, Leon-Muñoz LM, Rodriguez-Artalejo F, Lopez-Garcia E.2011).
Talea Claassens gr11 Life Sciences Title: The effect of Red Bull (caffeine) vs taking nothing on your heart-rate and speed during the course of a 50m swim. Research Question: Will Red Bull have a positive result on your heart-rate and swimming speed compared to the results of not taking the red bull. Hypothesis: The Red Bull will have the best result on the heart-rate and swimming speed (increasing your speed) followed no supplements.
Research on the use of toxicants involves efficiency, delivery systems and by-kill (Marks et al. 2006). Moseby & Hill (2011) undertook a large scale baiting trial with 1080, they found a major decline in cat activity after the first baiting event however. 1080 is not species-specific, Denny (2001) calculated that, at least 61 native vertebrate species were known to have consumed 1080 poison bait, and 24 of these natives were known to have been killed by 1080 poison. Eason et al. (2010) explored the use of Para aminopropiophenone, a poison used as an alternative to others, it’s said to provide gradual loss of consciousness and death without the pain and suffering that other compounds can
It beats for about 60 times per minute as compared to human heart which beats for about 80 times per minute. A manatees heart is seen to beat slow as 30 heartbeats per minute on longer dives. Whereas in dugongs it has double ventricular apex of heart. The unusual feature of the sirenian heart is that the heart has double subvalvular conus and dorsal left atrium.
But many athletes, then athletes in the broadest spectrum of disciplines, as well as students who are learning hard for exams, used pure synthetic caffeine in the form of pills. In whatever form that takes, caffeine eventually decompose and stimulates the release of fat. It is believed that caffeine stimulisee release of excitatory hormones epinephrine and neorepinefrina from the adrenal gland, and also stimulates the brain to release dopamine; thus stimulates the release of fat and increases energy, stamina and mental clarity. This naturally raises us and "pump" we metabolism, a posledeca is greater calorie burn. Contrary to what would you say to some experts, these effects can be obtained without the unwanted side-effects.