Control of Ventilation - Acid Base Balance

Question 1

Do the peripheral receptors respond to an increase in plasma [H+]

Answer 1

Yes

Question 2

What is the difference in the peripheral chemoreceptors responding to H+ and the central receptors responding to H+?

Answer 2

Peripheral receptors respond to hydrogen that is created by any means and central chemoreceptors only respond to hydrogen ions that are produced from carbon dioxide.

Question 3

What happens when plasma pH falls?

Answer 3

Ventilation will be stimulated (acidosis) by shifting the equation to the left by blowing of excess carbon dioxide and lowering [H+]

Question 4

What happens if the plasma pH increases?

Answer 4

Ventilation will be inhibited (vomiting), alkalosis, decreased ventilation will shift the equation to the right by retaining CO2 and increasing [H+]

Question 5

What are the two responses of the respiratory system during acid-base imbalance?

Answer 5

The respiratory system can either compensate for an acid base imbalance, if that imbalance has happened because of a metabolic source such as lactic acidosis.
Or it can cause an acid base imbalance if the respiratory system is the source of the disturbance to hydrogen ion concentration.

Question 6

If the respiratory system is the cause of the acid base imbalance what is it called?

Answer 6

Respiratory acidosis and alkalosis

Question 7

If the respiratory system isn’t the cause of the acid base imbalance what is it called?

Answer 7

Metabolic Acidosis and Alkalosis

Question 8

What is the equation for pH with regards to bicarbonate and carbon dioxide?

Answer 8

pH 𝛼 HCO3/CO2

Question 9

What happens to ventilation when we exercise?

Answer 9

It increases

Question 10

What happens to the partial pressure of oxygen and carbon dioxide during exercise?

Answer 10

They remain constant.

Question 11

What are the three control aspects of breathing?

Answer 11

• Hyperventilation
• Breath Holding
• Swallowing