CO2 transport in the blood

Question 1

Carbon dioxide (CO2) picked up at the tissue level is transported in the blood to the lungs in three ways:

Answer 1

(1) physically dissolved
(2) bound to hemoglobin (Hb)
(3) as bicarbonate ion (HCO3−)

Question 2

__________ is present only in the red blood cells, as is __________

Answer 2

Hemoglobin

carbonic anhydrase

Question 3

the enzyme that catalyzes the production of HCO3−.

Answer 3

Carbonic anhydrase

Question 4

The H+ generated during the production of _____ also binds to _____

Answer 4

HCO3−

Hb

Question 5

Bicarbonate moves by __________ down its concentration gradient ______ the red blood cell and ______ the plasma.
Chloride (Cl−) moves by ___________ into the red blood cell _________ created by __________

Answer 5

facilitated diffusion
out of
into

means of the same passive carrier
down the electrical gradient
the outward diffusion of HCO3−.

Question 6

The reactions that occur at the tissue level are _________ at the pulmonary level, where ______________

Answer 6

reversed

CO2 diffuses out of the blood to enter the alveoli.

Question 7

Respiratory control centers in brain stem:

Answer 7

• Pons respiratory centers

- Medullary respiratory center

Question 8

Pons respiratory centers:

Answer 8

• Pneumotaxic center

- Apneustic center

Question 9

Medullary respiratory centers:

Answer 9

• Dorsal respiratory group

- Ventral respiratory group