The Response to Chemoreceptor Stimulation (PK9)

Question 1

What size effect does change in blood pH due to respiratory acid-base changes have on CSF pH?

Answer 1

Steep

Question 2

What size effect does change in blood pH due to metabolic acid-base changes have on CSF pH?

Answer 2

Shallow

Question 3

What is the relationship between CSF pH and alveolar ventilation

Answer 3

• Linear
• Lower pH, higher ventilation

Question 4

Describe the curve of ventilatory response to PaCO2

Answer 4

• Linear
• Steep
• Decreasing PaO2 makes it steeper
• Increasing PaO2 makes it shallower

Question 5

Describe the curve of ventilatory response to PaO2

Answer 5

• Hyperbolic
• Less steep
• Decreasing PaCO2 shifts curve to left
• Increasing PaCO2 shifts curve to right
• Much steeper below 8kPa