Overview of Respiratory Control (ii) (PK8)

Question 1

Where does respiratory control reside, and which type is each?

Answer 1

• Brainstem (metabolic control - automatic)
• Cortical (behavioural control - voluntary)

Question 2

What provides chemical feedback to respiratory control?

Answer 2

V̇CO2 + V̇O2

Question 3

What provides mechanical feedback to respiratory control?

Answer 3

Respiratory muscles

Question 4

3 phases of breathing

Answer 4

• I (inspiration)
• PI (expiration)
• E-2 (expiration)

Question 5

How do muscles work in the phases of non-quiet breathing?

Answer 5

• Diaphragm contracts in I phase
• Diaphragm gradually relaxes in PI phase
• Accessory respiratory muscles contract in E-2 phase (diaphragm silent)