Carbon Dioxide In The Blood

Question 1

What is RBC production of HCO3- dependant on?

Answer 1

Hb binding to H+

Question 2

Why is there more CO2 in plasma in venous system?

Answer 2

Less O2 in venous system
Less binds to Hb - Tense state
Tense state means more H+ binds
More H+ binds - more HCO3- can be produced

Question 3

Why are more carbamino compounds formed at the tissues?

Answer 3

Because PCO2 is higher

Unloading of O2 facilitates CO2 binding to Hb

Question 4

What 3 forms is CO2 transported as and in what percentages?

Answer 4

10% - Dissolved CO2
30% - Hydrogen carbonate
60% - Carbamino compounds

Question 5

Define hyperventilation.

Answer 5

Ventilation increase without change in metabolism

Question 6

Increasing ventilation rate due to a drop in pO2 and no change in pCO2 will lead to what?

Answer 6

Hypocapnia

Question 7

What does pH have to fall below for enzymes to denature?

Answer 7

7

Question 8

What are the 4 sensors in the control of respiration?

Answer 8

Central chemoreceptors
Peripheral chemoreceptors
Joint and muscle receptors
Pulmonary receptors