Bone Loss Lab Report

In this lab, the purpose was to determine the stability of a substance after adding an acid or a base. The results claim that liver and buffer are the most resistance to change in pH. Looking at figure 3, buffer and liver both maintain a stable pH even with the addition of an acid or base. However, potato and water have less buffer in them since their pHs did change. In figure 3, the potato acid’s pH level decreased by two, and the potato base’s pH level increased by two. The level of pH of a water acid decreased by 4, while the water base’s pH increased by 5. These results all tie to the fact that buffer is a substance that maintains a stable pH; the presence of buffer in organisms help maintain homeostasis by binding or releasing hydrogen

Purpose/Hypothesis: The purpose of this experiment is to use both cabbage juice and pH paper to determine the pH of household items. This way, we can tell which products are basic and which one are acidic. If we use cabbage juice as an universal pH indicator by comparing it to pH paper then pH determined by the cabbage juice will be unstable because by using cabbage juice, it can be different depending on how diluted it is.

The null hypothesis will be that the test tubes with an increase in temperature, pH values, enzyme concentrations, and substrate concentration will have a very small color change or no color change at all. The alternate hypothesis is that the test tubes containing an increase in temperature, pH values, enzyme concentrations, and substrate concentration will all have an intense color change; the more the change, the more intense the color change will be.

Controls- The control in this experiment was very important because if it was not contained, then the data would have been faulty. It was very difficult to keep

Writer, producer, and director, Marti Noxon makes us look at the deep perspective of anorexia in her film “To the Bone.” The film takes place In Los Angeles at Threshold; a group home for people struggling with eating disorders. The group home is running by Dr. William Beckham (actor Keanu Reeves). The film came out on Netflix July 21 of 2017. Noxon goal was to bring awareness of the dangers of eating disorders to teens and young adults. Most of the group in Threshold are anorexic, and they often referred by the nickname ‘rexies.’ Lilly Collins plays the main character, Ellen, a20-year-old ‘rexie.’

GROSS DESCRIPTION: Exam of the specimen designated “left fallopian tube” reveals the presence of a fallopian tube measuring 6 cm in length and 2.3 cm in average diameter. Sectioning of the tube shows it to be

Table 2: Consists of color extract taken from a red cabbage for a natural indicator. The pH reading that was measured by using the pH meter and the result of the pH reading to determine whether the solution was acidic or basic.

As a group we encountered several possible errors throughout the experiment. Blunder error is a common error than can occur.

An experimental control is a test that lacks the experimental variable. Was one of the solutions prepared in this lab a control? If so, which one? Yes, the tap water being boiled at a 100.5 C that receives no added table salt is the experimental control.

To start off the experiment 25mL of water was placed into a labeled beaker and tested for the pH using pH test strips. Next the antacid tablet was placed in the solution and timed for how long it took to dissolve the tablet. Finally the temperature was measured. This same process was repeated for the acidic solution, and finally for the basic solution. After each experiment the pH, the reaction time, and the temperature of the beaker were recorded into a table. For this experiment the independent variable was the substance used (acid, neutral or base), and the dependent variable was the reaction time of each substance. The constant conditions of this experiment included the amount of substance being used, and the placing of one antacid tablet into each beaker. The experimental group was the acidic and basic solution, and the control group was the neutral

My partner and I choose glucose, colchicine, cold temperature (0 degrees Celsius), and warm temperature (37 degrees Celsius) as the addition factors. The tetrahymena were exposed exposed to their condition for ten minutes before the India ink was placed in their microcentrifuge. The tertrahymena were fixed on a slide every ten minutes after the ink was placed in the microcentrifuge. In this experiment there are two controls. There is positive control and a negative control. The untreated sample is tetrahymena that did not have any other conditions besides the ink. Then before the sample was placed on the slide they were fixed. The treated sample was tetrahymen mixed with

The question presented in the lab experiment was the following, “What is the water quality of the U-High creek based on invertebrates found in the water.” The purpose of this experiment was to find out the water quality of the U-High creek. To find the answer, invertebrates were looked at and the different species were categorized into three different categories. Pollution tolerant, mildly pollution tolerant, and lastly pollution intolerant. The original hypothesis was that the water quality was fair. However this hypothesis has been completely rejected after the final discoveries were made and taking a closer look at the actual species showed the water quality was not only fair but actually excellent.This was found because of

Introduction: Exercise is a physical activity or particular movement that is used in order to become healthier and stronger. (1) Exercise, in all of its forms, has various effects on the different systems in the human body. One of the main benefits is cardiovascular health, including circulation and heart health. Exercise uses a lot of energy, which the cells derive from oxidising glucose. Meaning that the heart has to work harder to pump more blood throughout the body and the heart has to beat faster in order to achieve a high effort. (2) The heart benefits from exercise include being able to pump more blood through the body and continue working at a higher level with less strain. (3)

The bone mineral density (BMD) and body mineral content (BMC) was found through dual energy x-ray absorption. There was a difference found between the BMD and BMC between the groups. The BMD and BMC was lower in the ethanol fed rats. The mechanical properties of bone were evaluated through a three point bend test. No bone mechanical properties differences were found between the groups. There was no significant difference in biomechanical test. To get better results a more ideal situation would be to pretreat the bone mass value of the rats. This would have been difficult to do because its time consuming and requires the rats to undergo anaesthetize for a long time which could kill some of the subjects.

This experiment shall be repeated twice or more to enhance accuracy of the results obtained. Besides detecting systematic errors, this experiment would aid on the technique and understandings to the correct use of these equipments.