Phy3171 Practice Exam 2009

This is an example of the final exam paper for PHY3171. It is very similar in format to the real paper for 2009. Some questions are from past papers, some are on this years and some I’ll use in the future. ________________________________________________________________________ SECTION ONE: LONG ANSWER QUESTION (Suggested time: 60 minutes) Answer the following TWO (2) questions (questions 1 and 2). Answer each question in a SEPARATE answer booklet.
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QUESTION 1 Answer ONE of EITHER (A) or (B) BUT NOT BOTH

(Suggested time: 30 minutes)

(A) Describe the mechanisms that regulate arterial pressure during and after a reduction in central blood volume. Include in your answer: (i) (ii) the neural mechanisms that come into play immediately to maintain arterial pressure (short-term). (Suggested time: 10 minutes) the hormonal mechanisms that might be important over the medium-term to maintain arterial pressure and increase blood volume. (Suggested time: 10 minutes) the mechanisms that would promote recovery of blood volume over the long-term. (Suggested time: 10 minutes)

(iii)

OR (B) Describe the mechanisms that act to increase salt and water excretion during an acute increase in central blood volume.. Include in your answer: (i) (ii) (iii) (iv) the afferent, central nervous system and efferent pathways that mediate changes in renal sympathetic nerve activity. (Suggested time: 10 minutes) two hormonal mechanisms pressure diuresis/natriuresis (Suggested time: 10 minutes) (Suggested time: 5 minutes)

two examples of how neural and/or hormonal mechanisms interact with the pressure diuresis/natriuresis mechanism. (Suggested time: 5 minutes)

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SECTION ONE: (continued) QUESTION 2 Answer ONE of EITHER (A) or (B) BUT NOT BOTH (A) Coronary artery disease secondary to atherosclerosis is