. Tap the \"Graph\" tab and select \"Autoscale ance\". The data logger will now
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Question
. Tap the "Graph" tab and select "Autoscale ance". The data logger will now automaically adjust the plot scale during the 10 minutes of data collection, stopping collection at the end of 10 minutes 9. Tap on the "Analyze" tab from the top menu followed by "Curve Fif', select the Oz graph and Linear Regression. Record the value for m (the slope of the regression lise and therefore the rame of Oz uptake) in the appropriate box in the table below. Repeat for the CO graph 10. Return the earthworms to their coetainer and clean and dry the chamber 11. Confirm that your data logger is neted to the HP laser printer in the lab (ap on the wi-fi icon in the bottom right-hand corner to see the available connections and the current connection). 12. To printhe currenty diphayed gnph, uhr to e n "Graph". You will have an opportunity to add a label to your gragh before it is printed Make sure to print copies for every member of your group then Table 3. Metabelic rate of earthworms Toual weight of Rate of O, pake Rate of regpirasionm b earthworm's in of Refer to the previous experiment for the sechnique for coaverting ppmusec to m/min and complete the calculation of the metabolic rate for the enethworms. Answer the following questions using the data from the table and your knowledge of respiration 1. This experiment was carried out at room temperature (about 21"C). If the same experiment was carred out at a higher or lower temperature, whot change fif any) would yuu expect to observe in metabolic rate? Most animals that we are familiar with carryout gas eschange by respiration (breathing in and out). Earthworms must also carryout gas exchange. How do you think this is carried out? 1s there anything you can 2. observe about the earthworms that supports your idea? 74Explanation / Answer
Metabolic rate and temperature dependance in earthworm
Earthworms are cold blooded animals so they cannot regulate their body temperature like mammals. Thus, higher environmental temperatures increase their rates of metabolism and either they feed more or do burn their own fat reserves.
The reverse is true when the soil temperature is low. Worms can't survive in temperatures below freezing or above 35 degree Celsius (95 degrees Fahrenheit). At temperatures greater than 25 degree Celsius (77 degrees Fahrenheit), worms eat and digest their food faster. The best temperatures are between 16-27 degree Celsius (60 and 80 degrees Fahrenheit), which are ideal for the growth and activity of earthworms.
Thus on increasing the temperature rate of metabolism will be increased and on decreasing temperature the metabolic rate will be down.
Gas exchange in earthworm
This gas exchange is necessary for earthworm’s survival. They do not have specialized respiratory organs hence, they take in oxygen and give out carbon dioxide directly through their skin. Oxygen diffuses in through the earthworm’s body surface and moves inward to network of capillaries lying just under the body surface. It circulates with help of blood containing hemoglobin within red blood cells.
The oxygen is consumed by body cells and thus produced carbon dioxide is picked up by the blood and diffuses out into the air through the body surface.
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