Fibrin Microthreads

18. Draw a best-fit line for the Tonga Trench data. A best fit line is a smooth line that shows the trend of the data; the line does not have to pass through the data points.

The gradient in site 1 was 0, in site 2 it was 3 and in site 3 was 4. The hypothesis for this was the river gets steeper as you go downwards as the gradient decreases. My measurement is correct based on facts and my theory.

There are several sources of error to this experiment due to random and systematic errors. The only source of random error was the measurement that we took through the graduated cylinder which was only accurate to the nearest 1%. We took the largest error from this one percent, which was +/- 3. The largest relative error this yielded was only 3%, so this did not affect how precise this experiment was too much. We can still make this more precise by making the masses of the water larger. For example if we started the masses at 300mL and went up by 50mL, the largest error this would yield would be 2% due to the largest error being +/- 5. This would cause smaller errors in the amount of water.

8. Which fiber would be more suitable for athletic wear—one that wicks or one that absorbs moisture? Why?

To start off the lab we did simple measurements with two different rulers, both measuring in centimeters but had different amounts of divisions on the second one making its measurements more precise. The first item to measure was a 13 x 100 mm test tube, again using the two different ruler’s metric ruler A and metric ruler B. After recording the measurements with the accurate rounding, we did the same steps to measure the diameter of a watch glass and an evaporating dish.

I would use a bar graph because it would be easy to follow and understand the information presented.

Questions to answer in your lab report. NOTE: some questions pertain to the week 1 exercise, some to week 2, and others to both. How is the amount of temperature variation related to the volume of the water body? How might you measure the speed of temperature change? How would you expect the speed of change to vary with habitat volume? Are water temperatures different than air temperatures? How are they different? Are there any cyclical patterns in the temperature-logged data (“time series”) from Angel? If so, what do you think caused these repeating patterns? Based on the results of this exercise, how might you

The experiment is repeated twice and an average is obtained. This ensures the consistency of the measurement as the reading is triplicated, thus reducing anomalies. It can be seen that the reading obtained were around the same value. This proves that the results are reliable.

The scatter plot of Credit balance ($) versus Size show that the slope of the „best fit‟ line is upward (positive);this indicates that Credit balance varies directly with Size. As Size increases, Credit Balance also increases vice versa. Correct

2. Discuss the anatomical differences between frog and human hearts. The frog heart has a single ventricle and two atria.

In order for efficient fixation and processing times to occur, all tissues should be no thicker than 3mm (Washington School of Medicine, 2016). When a tissue sample is thicker than the recommended thickness, penetration and crosslinking of the sample tissue proteins will take an increased amount of time for this to occur. The centre of the tissue may undergo autolysis as the proteins located within the centre of the sample will not be reached at an optimum time. Additionally, the sample may be prevented from undergoing complete fixation by the chosen fixative. However when careful cutting techniques are utilised and the care is taken to cut optimally sized tissue samples, the desired fixation efficiency can be achieved. There are a few processes

Thrombin is a naturally occurring protein that is present in the blood of humans and animals. The main function of thrombin is as an intermediate step during hemostasis, which slows bleeding by forming blood clots. Thrombin acts as an enzyme during an injury, converting fibrinogen to fibrin, which then causes blood clots to form. Due to its properties, thrombin’s application to the medical field includes topical surgery in the case of minor injuries as well as various other medical procedures such as neurosurgical operations. Apart from applications in the medical field, thrombin also plays significant roles by directly interacting with endothelial cells throughout the body.

The inflow into the tank was then graphed to show the Inflow vs. Time, the results obtained had some outliers in the initial negative trend so a linear interpolation of the part of the data set

The line of best-fit is used to find the gradient, the T2/L value, if straight or linear it shows that the relationship between the two is directly proportional. Using the original equation, you can square both sides and rearrange it to make . Then you can input the gradient value (T2/L) and work out g. , where g equals 10.13 m/s2. This value is close to the

The trendline, known as the line of best fit or the least squares regression line, shows the linear equation which best explains the sums up the data’s trend. The formula on the right is the formula of the line of best fit.