List the physiological factors that increase respiratory rate. Include an explanation of the mechanism by which each achieves this increase.

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College Answer

Good candidates had a structured approach to this questions. Submitted question
structures took the form of key headings (eg, PaCO2, PaO2, pH, etc) with an 
accompanying explanation, which included diagrams, which were often 
underutilised. Candidate answers that lacked any structure were more likely to have 
omissions and lacked sufficient depth and as a result scored fewer marks. For a 
good answers candidates where expected to list and explain (preferably by including 
diagrams) physiological factors such as PaCO2, PaO2, pH, Exercise, temperature, 
pregnancy and the associated receptors for each mechanism.
Syllabus: B1c 1
Reference: Nunn’s Applied Respiratory Physiology, Lumb, 6th edition 60-68
Principles of Physiology for the Anaesthetist, Power & Kam, 1st edition 92-98