TITLE: Effect of the caffeine on the heart rate OBJECTIVE: To investigate the effect of the caffeine on the heart rate of living organisms. INTRODUCTION: * Daphnia Daphnia are small‚ planktonic crustaceans‚ between 0.2 and 5 mm in length. Daphnia are members of the order Cladocera‚ and are one of the several small aquatic crustaceans commonly called water fleas because of their saltatory swimming style (although fleas are insects and thus only very distantly related). They
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Description To investigate the effect on caffeine on heart rate of water fleas and to understand the risk of high level consumption of caffeine to the health of the human circulatory system and nervous system. Preview Diagram 1: Chemical structure of caffeine Image source: http://ismaastricht.wikispaces.com/file/list The images above show the chemical structure of caffeine which has a chemical formula of C8H10N4O2. Caffeine was named by the International Union of Pure and Applied Chemistry
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The Effect of Different Concentrations of HCl on the Rate of Reaction Between HCl and Sodium Thiosulfate Chemistry Lab report Aim: The aim of this experiment is to determine how concentrations of HCl acid affect the rate of reaction when reacted with Sodium Thiosulfate (Na2S2O3). This experiment would require measuring the mass of the reaction over a period of time to be able to determine the rate of the reaction. Safety Precautions: In this experiment‚ SO2 gas is produced from the reaction between
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concentration of ions of a sparingly soluble salt in water OTHER than at equilibrium is called the IONIC PRODUCT Example 1. AgCl [pic] Ag+ + Cl- Ksp = [Ag+][Cl-] Example 2 Cu(OH)2 [pic] Cu2+ + 2OH- Ksp = [Cu2+][OH-]2 Checkpoint A Write the Ksp expressions for the sparingly soluble salts below a. AgF b. HgCl2 c. Cu(OH)2 Common ion effect The solubility of one salt is reduced by the presence of another salt having a common ion. For example
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Heart Rate Research Question: Do different exercises have different effect on heart rate? Method: 1. Find test subject 2. Prepare for activity (stretching) 3. Take heart rate of subject before exercise 4. Record heart rate 5. Do sit ups for 2 mins 6. Time using stop watch 7. Record heart rate 8. Allow subject to rest (lower heart rate) 9. Begin next exercise 10. Jumping jacks for 2 mins 11. Time using stopwatch 12. Record heart rate 13. Allow subject to rest (lower heart rate) 14. Squats for
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The purpose of this lab was to find my and my fellow classmates resting heart rate and record it. There were seven people in the class and we all participated in this study. There are four places to check heart rate and they are in your wrist‚ the inside of your elbow‚ the side of your neck‚ or the top of your foot. Everyone used the wrist or their radial artery. We used our middle and index fingers to gently feel for the radial artery in each others pulse. I then counted the pulse for 10 seconds
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The Effect of Visual Stimuli on Heart Rate HL Biology James Kosiol Focus Question What is the effect of a timed visual stimuli (45 seconds)‚ in the form of flashing coloured lights (White 0/s (control)‚ White and Black 1/s‚ Blue 2/s‚ Red 3/s‚ Green 4/s and Multicoloured 5/s) on the heart rate of the viewer? Table of Contents 1.Design 1.1 Defining the Problem Focus Question What is the effect of a timed visual stimuli (45 seconds)‚ in the form of flashing coloured
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Caffeine effect on Daphnia’s heart rate Prepared for: Androniki Kloni By: Maria Mitsi October 6‚ 2013 Abstract Caffeine is a bitter‚ white crystalline xanthine alkaloid and a stimulant drug. Caffeine is found in varying quantities in the seeds‚ leaves‚ and fruit of some plants‚ where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants‚ as well as enhancing the reward memory of pollinators. An experiment was held‚ on an aquatic
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music affect the heart rate and what different types of music have a greater affect on heart rate? Music most definitely has emotional value. Heart rate can be directly influenced by these emotional changes. Our group decided to test music tempo’s effect on heart rate. This experiment is relevant to one’s health because it is important to understand how to control one’s heart rate. Before we started conducting our experiment‚ we hypothesized that fast tempo music increases heart rates while slower
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muscle‚ and to explain why it is not possible to tetanize cardiac muscle. 4. To define extrasystole‚ and to explain at what point in the cardiac cycle (and on an ECG tracing) an extrasystole can be induced. 5. To describe the effect of the following on heart rate: vagal stimulation‚ cold‚ heat‚ pilocarpine‚ atropine‚ epinephrine‚ digitalis‚ and potassium‚ sodium‚ and calcium ions. 6. To define vagal escape and discuss its value. 7. To define ectopic pacemaker. I nvestigation of human cardiovascular
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