Animal Physiology, Spring, 2000

Bi 377, Hour Exam 3

Instructions:

1) After receiving the exam, you are free to work on the answers in any classroom in Boyd Hall.

2) You may not use any information other than what you have stored in your brain (no notes, books, etc.)

3) Please limit your answers to the space provided beneath each answer. Feel free to use labeled diagrams to enhance your answers. Write clearly and concisely.

4) You have 1.5 hours to complete this examination. Remember that you have agreed not to discuss this examination with anyone else in the class until all have taken it (I will let you know in class).

5) Please sign below if you agree to the above policies.

GOOD LUCK!

Honor Statement: I have read the above instructions and agree to them. I promise to neither give nor receive any help on this examination.

Signed,

Short Answer. Choose seven out of the following eight questions. Each is worth 10 points. These questions can be answered in 3-6 sentences or a labeled diagram and 2-3 sentences.

1) Briefly describe the circadian system of the cockroach.

2) List several ways that hormones can affect a cell.

3) Describe in diagrammatic form how mammalian metabolism is maintained at homeostatic levels.

4) Identify/define four (out of five) following in one or two sentences: (@2.5 pts)

a) Barbara Pratt

b) Lawton, 1987

c) rhodopsin

d) lateral inhibition

e) pheromones

5) Explain, in diagrammatic form, how light is transduced in rod cells and the information passed on to other cells.

6) Explain the physiological processes that are occurring in the diagram presented below.

7) Briefly describe how the mammalian auditory system determines frequency (pitch).

8. Briefly describe how the mammalian kidney helps to maintain ionic balance in the blood.

Essay Questions: (@ 15 pts) Answer the following questions in essay format (a paragraph or two with topic sentences followed by information supporting the topic sentence). You can also use the back side of this sheet of paper. DIAGRAMS (FIGURES) ARE ALSO STRONGLY ENCOURAGED!

1) Our poster presentation (on lobsters) has been accepted at the National Academy of Sciences annual meeting in Hawaii next December! But we have to perform two experiments that extend our current findings before that time. Describe the two most important yet "doable" experiments that you can think of, the possible outcomes, and the interpretations of the possible outcomes.

2) On a trip through Madagascar, you run into an old PSC friend who has been diving off the coast looking for Coelocanth specimens. Knowing that this is a deep-water species, you begin to ask him about his diving methods. He claims that he has the "diving physiology of a Weddel seal". What are the physiological features that allow Weddel seals to dive so well (versus humans)?