Measuring haemodynamic variables using different techniques and examining the effects of diving reflex‚ isometric muscle contraction and psychological stress on these variables. Introduction Haemodynamics is the study of factors that determine the movement of blood (Widmaier et al‚ 2011). The main haemodynamic factors are heart rate and blood pressure. Heart rate is defined as the number of times the heart contracts per minute. Normal resting heart rate in adults ranges between 60 – 100 beats
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Part 1. Cellular Respiration Prarthana Minasandram Partner: Ben Liu Introduction Purpose: To examine the rate of alcoholic fermentation using various carbohydrates. Hypothesis: If the yeast is placed in 5% glucose or sucrose solutions‚ then carbon dioxide production will increase over time. If boiled yeast is placed in a 5% sucrose solution‚ then carbon dioxide production will remain constant. Variables Independent variable: Carbohydrate solutions (5% solutions of glucose and sucrose) and
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Introduction: Carassius auratus‚ the goldfish‚ is a poikilotherm as its body temperature fluctuates based on its surrounding environment. Like most fish‚ the goldfish depends on a balanced metabolism to survive; therefore‚ it is important to understand the relation that these poikilotherms have with their environment. An environmental factor that regulates metabolism is temperature. Since fish have temporal ranges that determine their overall success it is important to understand their metabolic
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Humans have an attention span less than that of goldfish. Although there are some benefits to the advanced technology that we have no‚ the increase of easily accessible technology has had an immense effect on people. The technologies that are readily available‚ such as laptops‚ smartphones‚ smartwatches‚ and televisions‚ have become easy distractions to adults and adolescents alike. There are many views as to if this effect is beneficial to the people or not‚ but there have been many studies conducted
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Science investigation Aim: To try to see if the temperature affects the rate in which Amylase breaks down starch into maltose. In this reaction starch is the substrate and maltose is the product. Amylase is an enzyme‚ Enzymes‚ also called catalysts‚ are in living things and there are thousand of them. Enzymes break down food by the active site on the Enzyme forming a chemical bond with a substrate and then water attacks the substrate until it is hydrolysed (split in 2). Equipment: Boiling
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various surfaces‚ how might temperatures differ between urban and rural areas? Which setting tends to be warmer on a given day and why? Also‚ are there any factors other than albedo that might affect the temperature differences between the two settings? On any given day the urban areas are hotter than that of the rural areas. Urban areas tend to be warmer than surrounding rural areas due to urban heat islands Albedo is a major factor in increase of the urban temperature. Albedo is “the fraction
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PHET 8 Battery-Resistor Circuit Name Course Date Learning Goals To visualize the interplay between the voltage‚ resistance‚ current and temperature in a conductor Check “show battery” and “show cores”‚ watch what happens‚ adjust some variables 1. Why do electrons (blue dots) move? The flow of current (+) is opposite to the flow of the electrons. ; note if toward or away from + terminal of the battery. The electrons move due to voltage of the battery
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with a larger density will increase the temperature of the ice faster than salts with a smaller density because the heavier salts will sink through the ice faster since they have a heavier density than water and stop the molecules from staying ice faster‚ consequently raising the temperature of the solution‚ than lower density salts would. . The data I collected shows potassium chloride‚ which has a density of 1.98 g/㎤‚ increased the solution’s temperature at a faster rate than any of the other solutions
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1.Explain the process of Cellular Respiration in order. Where does each step occur in a cell‚ which steps require oxygen‚ and how many ATP are produced in each step? Cellular respiration is the breakdown of glucose in the presence of oxygen to yield ATP. Glycolysis is the first stage in the breakdown of glucose and It occurs in the cell’s cytoplasm. It does not require oxygen (anaerobic). This step also occurs in two steps‚ the energy investment step‚ and the energy yielding step. This process yields
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Experiment to investigate the effect of concentration of electrolyte on the current of voltaic cell Aim The aim is to identify the relationship between the concentration of H2SO4 solution and the current of Cu-Zn voltaic cell. Hypothesis My hypothesis is that the greater the concentration of sulfuric acid the bigger the current of the voltaic cell. In a voltaic cell‚ chemical energy is concerted to electrical though the oxidation and reduction happen on the electrodes. Current will not flow
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