midterm2010

midterm2010 - 1 MCDB 111/ Introduction to Physiology -...

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1 1 MCDB 111/ Introduction to Physiology - Midterm, Winter 2010 Your Name: Perm #: Your TA's name: Discussion section time: 1. (12) ________ 2. (9) ________ 3. (10) ________ 4. (8) ________ 5. (6) ________ 6. (8) ________ 7. (5) ________ 8. (4) ________ 9. (8) ________ 10. (4) ________ 11. (6) ________ total (80) ________ 1. The short-term regulation of plasma cortisol involves a negative feedback loop shown here: a. In this diagram, where would you expect the integrating center(s) to be, and what is/are the efferent signals? (4 points)
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2 2 b. Cortisol is a steroid hormone. One of the effects of cortisol on liver cells is to increase the amount of the enzyme glucose-6-phosphatase. Briefly, describe in words or a diagram the mechanism by which cortisol increases glucose-6- phosphatase. (4 points) c. What is the effect of cortisol in metabolism, and why is this an appropriate response to stress? (4 points) 2. The figure below shows two graphs. The top graph is from the text and shows the relative tension in a skeletal muscle fiber as it receives a series of stimuli (S) from a motor neuron. a. The bottom graph needs to be filled in by you.
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This note was uploaded on 02/14/2011 for the course MCDB 111 taught by Professor Smith during the Spring '11 term at UCSB.

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midterm2010 - 1 MCDB 111/ Introduction to Physiology -...

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