1. The structure of biological membranes is determined primarily by the lipid bilayer but the specific functions of these membranes are carried out by proteins associated with the membrane. State whether you believe this statement is true or false and explain your answer?

2. You are working on a farm and come across a worker who has been exposed to high levels of an insecticide containing an organophosphate. Organophosphates are known to interfere with acetylcholinesterase activity. Acetylcholinesterase is an enzyme that degrades acetylcholine in the neuromuscular junction. What will happen to the muscles that are affected by the organophosphate and explain why this happens?

3. While on a camping trip you and a friend run into a bear. Your friend begins to hyperventilate. You give him a paper bag and tell him to breath into it. Why does breathing into a paper bag help your friend return to normal and what would be the physiological changes in his body if they did not receive the first aid treatment?

4. The body’s oxidation of glucose is commonly described as the burning of fuel.  Is this analogy correct?  Why or why not?

5. A 30 year old male patient with emphazema goes to the hospital and is prescribed a urinalysis.  When the urinalysis test results are returned the patient’s urine has a low pH.  How could the patient’s emphazema cause this test result?

6. You grow a human cell line in an isotonic solution and you look at it under a microscope and notice that it looks relatively round and normal.  You then transfer the cell into a solution containing a high amount of salt.  You then look under the microscope again and notice that the shape of the cell has changed.  What shape do you see under the microscope and why has the cell changed to this shape.