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This experiment tested the hypothesis that there is no difference between before exercise and after exercise in terms of cellular respiration rates. The purpose of this experiment is to compare the rates of cellular respiration before and after vigorous exercise. During cellular respiration, glucose is broken down into CO2 (carbon dioxide). As CO2 (carbon dioxide) is bubbled through water, H2CO3 (carbonic acid) is formed. Because H2CO3 (carbonic acid) is a weak acid and dissociates in water, it forms HCO3- and H+ ions. As a basic solution is partially neutralized by an acid, phenolphthalein turns clear. Measuring the relative rates of the production of carbon dioxide before and after exercise can help us compare the rates of cellular respiration. We can estimate the rates of cellular respiration by measuring how much time it takes for the phenolphthalein to change color because the carbon dioxide we exhale would react with the water in the solution to form carbonic acid. Then the carbonic acid would neutralize the NaOH in the solution and would turn colorless when enough acid
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The “before” and “after” samples were produced with the same concentrations at the same time. First, 220 ml of H2O is measured in a graduated cylinder and poured into an Erlenmeyer flask. Then, 5 drops of 10% sodium hydroxide and 3 drops of phenolphthalein is added and swirled gently together. Next, the solution is aliquoted into two 250 ml Erlenmeyer flasks with 100 ml in each flask. The subject inserted a straw into the solution of one flask and blown gently through the straw. The observer watched carefully and recorded the number of seconds it took for the solution to change from pink to clear. The resting time is recorded and the subject exercised vigorously for five minutes. The subject repeated the blowing process through the straw using the second flask and the observer recorded the time it took for the solution to turn
Cellular respiration is the chemical process in which organic molecules, such as sugars, are broken down in the cell to produce utilizable energy in the form of ATP. ATP is the chemical used by all of the energy-consuming metabolic activities of the cell. In order to extract energy from these organic molecules, cellular respiration involves a network of metabolic pathways dedicated to this task.
To be able to carry on metabolic processes in the cell, cells need energy. The cells can obtain their energy in different ways but the most efficient way of harvesting stored food in the cell is through cellular respiration. Cellular respiration is a catabolic pathway, which breaks down large molecules to smaller molecules, produces an energy rich molecule known as ATP (Adenosine Triphosphate) and a waste product that is released as CO2.
small wad of absorbent cotton in the bottom of each vial and, using the pipette or syringe, saturate the cotton
Organisms are complex and use energy to function, grow, and reproduce. Organisms get this energy from photosynthesis and cellular respiration. Photosynthesis is the process by which plants harness sunlight to make glucose from carbon dioxide and water1. Photosynthesis provides glucose for cellular respiration. Glucose is the reactant for cellular respiration. Cellular respiration has complex stages, where the glucose molecule is slowly broken down. The formula for cellular respiration is C6H12O6 + 6O2 ⇢ 6CO2 + 6H2O + energy.
Purpose: The purpose of this lab is to study the relationship between cellular respiration in the muscles, and muscle fatigue due to lactate fermentation in anaerobic respiration.
The Purpose of the Cell Respiration Lab is to find the different levels of Oxygen consumption, and Carbon dioxide production in organisms releasing different amounts of energy a relative period of time.
Cellular respiration is the series of metabolic process by which living cells produce energy through the oxidation of organic substances. Cellular respiration takes place in the mitochondria. Fermentation is the process by which complex organic compounds such as glucose, are broken down by the action of enzymes into simpler compounds without the use of oxygen. The significance of these pathways for organisms is to allow for an organism to be able to generate ATP. Some organism that undergo cellular respiration are bacteria and fungi. Some organism that undergo fermentation are yeast and muscle cells. In cellular respiration, glucose is oxidized and releases energy. In cellular respiration, glucose produces ATP and 3-carbon molecules of pyruvate. The pyruvate is then further broken down in the mitochondria where it becomes oxidized and releases CO2 (Upadhyaya 2014). In the fermentation process oxygen does not play a part. This process converts glucose into pyruvate and produces ATP. From there pyruvate breaks down into CO2 and acetaldehyde (Upadhyaya 2014) Monosaccharides are known as simple sugars and their main function is being the source of energy for organisms. Disaccharides are two monosaccharides joined by a covalent bond and their primary function is to provide food to monosaccharides. Some disaccharides
The hypothesis of this lab was if yeast is exposed to glucose, fructose, lactose, sucrose and DI water, then the yeast will break down glucose at the fastest rate and produce the most CO₂. This hypothesis was supported by the results of the lab. The results showed that glucose produced the most CO₂ in comparison to the other solutions, supporting the idea that cellular respiration was happening the fastest in the glucose solution. As cellular respiration is occurring, CO₂ is being released into the air. The carbon in the CO₂ is coming from carbons in the reactants of cellular respiration and are released to get rid of excess carbons. By looking at the rate at which carbon dioxide is being produced, the rate of respiration can be identified because the release of CO₂ is a product of respiration
The Purpose of this experiment was to determine the importance of cellular respiration in the processes of Life. The objective of this experiment was to determine the rate of cellular respiration and how the presence of carbohydrates and pollutants will affect it. Our hypothesis was that an organism has larger rate of Cellular Respiration with the source of Carbohydrates as compared to the one that is without the Carbohydrates source and vice versa in
In this lab we are measuring the amount of oxygen used in both germinating and non germinating peas. We are measuring the oxygen consumption by taking a reading of a respirometer submerged in two water baths. The first bath will be cold water and the second warm to determine the effect of temperatures on oxygen consumption. Our negative control will be glass beads to measure to increase or decrease in atmospheric pressure or temperature changes. There is a direct relationship between oxygen consumption and Carbon Dioxide produced, therefore the more O2 consumed the more CO2 produced. To keep the amount of CO2 produced from canceling out any pressure gained or lost from the consumption of
In the experiment, the hypothesis that was made stated that cellular respiration would occur faster with addition of exercise. Given the data that was presented via the lab, our group was able to conduct that this hypothesis was proven correct, with all of our groups speed of color change speeding with the addition of exercise. This occurs because when the body is exercising the cells need a higher amount of oxygen in a
First glucose is broken down in the process called glycolysis, then the pyruvate molecules are moved to the mitochondria, when this is happening the pyruvate molecules are converted into 2-carbon molecules these molecules then enter the Kreb Cycle. Moving on the energy created will now enter the electron transport chain, this energy will then produce ATP. The reactants are glucose and oxygen and the products are ATP, water, and carbon dioxide. During the Cellular Respiration glucose is being oxidized, along with carbon. On the other hand Oxygen, NAD+ and FADH are being reduced in Cellular Respiration.
This experiment consisted of 3 respirometers, one with ants, one with radish seeds, and one with glass beads. Each with 4 pellets of KOH and a piece of cotton. They were placed in a water bath that was at 75 degrees fahrenheit. A bubble at the end of the respirometer was measured every five minutes, and this distance showed how well the organisms were respiring. The radish seeds were able to do the most cellular respiration in 25 minutes, with the ants being a close second, and the control respirometer of the glass beads doing the least.
The topic of this lab is on biochemistry.This experiment was conducted to show how cells prevent the build of hydrogen peroxide in tissues. My group consisted of Lekha, Ruth, and Jason. There were used two different concentrations of hydrogen peroxide through this experiment , 1.5% and 3%. By testing two different types it is easier to understand how the H2O2 and catalase react with one another. To do this both the yeast, which was our catalase, and H2O2 were mixed together in a beaker. Each concentration was tested out twice for more accurate results . 1.5% concentrated H2O2 had an average reaction rate of 10.5 seconds while 3% concentrated H2O2 had an average reaction rate of 7.5 seconds. From this experiment we learned that by increasing the concentration of H2O2 and chemically combining it with a catalase it will speed up the reaction. Enzymes speed up chemical reactions . The independent variable in this experiment was the concentration of the H2O2. Some key vocabulary words are Catalase, enzyme, hydrogen peroxide ( H2O2), and concentration.
As the intensity of exercise increased, so did the rates of the heart and breathing. After a small period of rest, the heart rate and breathing rate both decreased to a point close to their resting rate. This proved the stated hypothesis. First, the hearts average resting rate was recorded to be 76 bpm. The heart is therefore transporting oxygen and removing carbon dioxide at a reasonably steady rate via the blood. During the low intensity exercise (Slow 20) the heart rate increases to 107 bpm, which further increases to 130bpm at a higher intensity level (Fast 20). The heart therefore needs to beat faster to increase the speed at which oxygen is carried to the cells and the rate at which carbon dioxide is taken away by the blood.