Does caffeine affect heartrate?

Background Information:

Caffeine is a unhealthy white transparent xanthine alkaloid that acts as a psychoactive stimulant drug. A German chemist, Friedrich Ferdinand Runge, discovered it in 1819. Vegetation produce caffeine as a great insecticide. It is found in differing quantities in the beans, leaves, and fruits of above 60 plant life, where it can work as a natural pesticide that paralyses and kills particular insects feeding on the plants. Cocoa in South America, espresso in Africa and tea in Asia has every been intended for hundreds of years to make ‘pick me personally ups' that contain caffeine. These days caffeine is additionally used as being a flavour booster in a wide range of cola and also other soft drinks. Additionally , it has therapeutic uses in aspirin preparations and is seen in weight-loss prescription drugs and as a stimulant in students' exam-time favourites like Pro-plus and Red Bull. In human beings, caffeine is a central nervous system (CNS) stimulant, obtaining the effect of in the short term warding off sleepiness and rebuilding alertness. Beverages containing caffeine, such as coffee, tea, fizzy drinks and energy drinks enjoy great reputation. Caffeine is a world's most generally consumed psychoactive substance, although unlike most others, it really is legal and unregulated in nearly all jurisdictions. In The united states, 90% of adults consume caffeine daily. The U. S. Food and Drug Administration lists caffeine as a " Multiple Goal Generally Recognized while Safe Meals Substance". One 2008 research suggested that ladies consuming 2 hundred milligrams or even more of caffeine per day experienced about 2 times the miscarriage risk since women who got none, while another 08 study located no hyperlink between losing the unborn baby and caffeine consumption. By high numbers of consumption caffeine has been associated with restlessness, sleep problems and panic, causing increased stress and blood pressure. This may lead to heart and circulation problems.

HYPOTHESIS- Does caffeine affect heartrate?

PREDICTION-It is predicted that as the caffeine focus increases thus will the cardiovascular system rates


• The experiment will probably be conducted by room temp. on • Gather every equipment

• Help to make a range of caffeine alternatives of different concentrations and a control option that has not any caffeine in any way • Create a few hair strands of cotton wool on a cavity slide • Place the slide upon the scenario for light microscope and emphasis it • Using a pipette, transfer one large drinking water flea to cavity go • After that add a couple of drops of distilled normal water or pond water • Use a stopwatch to record the number of heart beats per minute in the water fleas under a microscope • Continue this process again but substitute the water with caffeine, consistently repeating the procedure with different concentrations of caffeine • Keep all the factors constant


Water fleas- I will be using the same scale fleas to ensure that I can control the amount of caffeine intake by them. Tooth cavity Slide- Same length, thickness and width

Dropping Pipettes- Closest to at least one nul, this leads to more valid results while having results to the actual worth. in Calculating Cylinder- 1 nul as a result of reading getting accurate, leading to test being valid Silk cotton Wool- A lot of thickness and brand because this allows same effect often.


|Equipment Applied |Possible Risk |Risk Lowering | |Standard Glassware |Could fall and break |Keeping all beakers and calculating | | | |cylinders tucked away, much in the middle. | |Paper Shower towels |Litter could cause a drain block |Paper towels must be put in the flag so| | | |that they do not cover our laboratories. | |Caffeine Tablets |They could be left out and little |Put...