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ENVIRON 242 Lecture Notes - Lecture 1: Basal Metabolic Rate, Scantron Corporation, Exogamy

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ochrerat803
4 Apr 2016
School
U of M
Department
Environment
Course
ENVIRON 242
Professor
John Speth

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Document Summary

General comments: the exam will be a machine-scored scantron format. I will pass out a printed exam with the questions, but you will mark your answers on the scantron sheet. If you find that a question is ambiguous (it happens! ), you are welcome to write a comment on the printed exam (not the. To be fair to everyone in the class, i cannot answer individual queries during the exam about specific questions or answers. Questions will all be multiple choice with only one (1) best response. While i don"t yet know how many questions there will be, you are very unlikely to experience any time pressure. So try to relax and read the questions carefully to get clear in your mind what each one is asking for. They are not designed to be tricky, but if you are too hasty in reading the question you may miss what it is seeking.

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Related Questions

I need to answer questions ( very specifically ) 1. What did each of the bottles represent? What does the water represent? 2. What circulatory system structure do the check valves represent? What is their function in the circulatory system? 3. What do you predict would have happened if there were no valves present in the model? How would this affect the human body? Experiment 3: Modeling the Circulatory System In this experiment you will explore and model the structures and function of the circulatory system. Procedure 1. Use the permanent marker to label the plastic bottles 1 and 2. 2. Use a nail to carefully puncture two holes in the side of each bottle (approximately 3.5 cm from the bottom of the bottle) so that the holes are across from each other and at the same height from the bottom of the bottle. It is best to puncture the bottle with the nail straight through both sides. This will help keep the holes level. LAB SAFETY: BE EXTREMELY CAREFUL WHEN PUNCTURING THE BOTTLE. KEEP IN MIND WHERE YOUR HANDS ARE AT ALL TIMES. 3. You may need to maneuver the nail around the hole to make it large enough to fit the plastic tubing (Figure 7). The goal is for the tubing to fit tightly in the hole. 2 Check Valves 2 Drops of Dye Nail Permanent Marker 2 Plastic Bottles 60 cm of Tubing *Scissors *Water *You Must Provide Materials Figure 7: Maneuver the nail in a circular motion to enlarge the hole so that the tubing fits tightly. 386 The Circulatory and Respiratory Systems 4. Carefully cut the 60 cm tubing into four equal lengths of 15 cm. 5. Attach one end of one piece of 15 cm tubing to the OUT end of a check valve. 6. Attach one end of a second piece of tubing to the IN end of the check valve. 7. Repeat Steps 3 and 4 for the remaining check valve. 8. Construct a closed system by inserting the free ends of the tubes into the holes you created in the plastic bottles to create a loop. The tubes should be far enough into the bottle so that water can flow from tube to bottle to tube. The tubes in each bottle should not touch (Figure 8). Note: Properly assembled models should have the direction of the check valves facing in opposite directions. 9. Fill each bottle ¾ with water. The water level should be higher than the tubing. 10. Place the model on an underpad or paper towel to protect surfaces for the next step. This will also help catch water that leaks from the model. There should be minimal leaking if tubes are tightly in the bottles. 11. Place one drop of dye in each bottle and close the bottle by screwing on the caps. 12. Gently swirl the bottles to allow dye and water to mix. Be careful not to squeeze the bottles! 13. Note where the water is initially before squeezing the bottles and record your observations in Table 2. 14. Squeeze bottle 1 with both hands. Observe the direction of water flow and the water level in each bottle while you are squeezing and right after you stop squeezing. Record your observations in Table 2. 15. Repeat Step 13 for the bottle 2 and record your observations. 16. Squeeze one bottle and then the other back and forth.