Regulation of Respiration

Question 1

What are the 4 major respiratory center groups

Answer 1

Dorsal- most fundamental role (not really anymore)
Ventral
Pneumotaxic
Apneustic

Question 2

What is the dorsal respiratory group’s function, where does it get messages from

Answer 2

Controls inspiration and rhythm
CN 9/10 send sensory information to DRG
Receives signals from peripheral chemoreceptors, baroreceptors, and lung receptors

Question 3

What is the “ramp” signal?

Answer 3

Motor signal transmitted from DRG to diaphragm is not instantaneous
Signal begins weak and increases for 2 seconds
Stops for 3 seconds to allow for expirations

Question 4

What controls the “RAMP”?

Answer 4

1. Control of the rate of ramp signal increases- Increases during activity
2. Control of limiting point at which ramp increases- Earlier the ramp ceases, shorter the duration of inspiration, frequency of respiration increases

Question 5

What is the pneumotaxic center?