Respiratory Physiology III

Question 1

Generation of the breathing rhythm

Answer 1

Hypo 1–> individual neurons spontaneousylt depolarize to generate action potentials acting like pace makers

Hypo 2 –> Complex interactions between neurula networks generate the breathing rhythm

Question 2

The Rhythmicity center

Answer 2

in the medulla, output signals from here control the activity of respiratory muscles, this includes both frequency and depth

Question 3

Pulmonary stretch receptors

Answer 3

Modulate the degree of lung inflation

Question 4

Central and peripheral chemoreceptors

Answer 4

sense chemical signals

Question 5

Arterial O2 Chemoreceptors

Answer 5

Increase ventilation in response to a decrease in Arterial PO2

Question 6

What controls the pH changes independent of CO2

Answer 6

Mediated via peripheral chemoreceptors