Regulation of Ventilation

Question 1

specialized receptors that monitor the pH, carbon dioxide, & oxygen levels in arterial blood

Answer 1

Chemoreceptors

Question 2

located near the respiratory center in the medulla

Answer 2

Central Chemoreceptors

Question 3

located in the aortic arch and the carotid bodies in the neck

Answer 3

Peripheral Chemoreceptors

Question 4

• located in the anterior medulla

- initates impulses- ventilation

Answer 4

Ventral respiratory group (VRG)

Question 5

• located in the posterior medulla

- works with VRG to control rate/depth/rhythm

Answer 5

Dorsal respiratory group (DRG)

Question 6

• inhibits impulses/switches to exhalation

- promote a smooth transition between inhalation & exhalation

Answer 6

Pontine respiratory center

Question 7

COPD pts. have a tendency to retain

Answer 7

CO2

Question 8

3 types of receptors within the lungs provide impulses to regulate respiration

Answer 8

• Irritant receptors
• stretch receptors
• J-receptors

Question 9

Irritant receptors

Answer 9

• found in the airways
• sensitive to irritating gases, aerosols & particles
• simulate coughing, bronchoconstriction & increased ventilator rate

Question 10

Stretch receptors

Answer 10

• found in the smooth muscle of the airways
• protect against over inflation of the lungs
• measure size & volume of lungs
• stimulate a decrease in the rate & volume of ventilation when stretched by high tidal volumes

Question 11

J-receptors

Answer 11

• found in the capillaries surrounding the alveoli
• sensitive to increase in capillary
• when activated, they stimulate rapid, shallow ventilation