Osmoregulation
Supplemental Instruction
Iowa State University / Leader: / Morgan
Course: / Bio 212
Instructor: / Shen
Date: / 11/18/2009
1. What is osmoregulation? Describe some key differences in the osmoregulation mechanisms of aquatic and terrestrial organisms.
2. What are the 3 types of nitrogen secretion in animals? What are the determining factors of which type and animal uses?
3. A solution on the left side of a semi-permeable membrane has a higher concentration of solute molecules than does the right. What will happen in the solution? Classify each side of the solution based on is osmotic properties.
4. Compare and contrast osmoregulation in saltwater and freshwater fish.
5. Salt water birds excrete ______fluid. Why? How is countercurrent exchange involved?
6. What is the function of transport epithelia? Give and example of a type of transport epithelium.
7. Describe the nephron of the kidney. What is its main function? How is countercurrent exchange involved?
8. What are the four general steps of excretion? (In your own words!)
9. What is reabsorption? Where does it occur? How is it regulated?
End of the semester study tips (ONLY 2 WEEKS OF CLASSES UNTIL FINALS!)
¨ Before each of the remaining lectures, try reading over the corresponding word doc. from WebCT. This is a good way to get some vocab recognition.
¨ Try re-writing your notes as an effective study technique
¨ Look over the first 3 exams and find your mistakes- not just what the right answer is, but WHY you missed it the first time around.
¨ Get into groups to go over old exams
¨ If you are confused about something, don’t be afraid to ask questions! Dr. Shen is there to help!
¨ Come to SI!!
Win an ISU bookstore giftcard! Take the SI evaluation (3 minutes, max.) http://www.dso.iastate.edu/asc/si