CO2 Transport & O2 Transport

Question 0

What are the 3 ways of CO2 transport?

Answer 0

1) dissolved in plasma 7%
2) attached to hemoglobin 23%
3) in the form of a bicarbonate ion (HCO3-) 70%

Question 1

In internal respiration (in the cells and blood), what happens?

Answer 1

• (CO2) CO2 is produced by cellular respiration in ALL CELLS
• (CO2) diffuses into the blood plasma and CO2 enters the red blood cell
• (H2O) inside red blood cell, CO2 interacts with water to produce carbonic acid
• (H2CO3) carbonic acid ionizes the red blood cell into a hydrogen ion and a bicarbonate ion
• (H+) hydrogen ions attach to iron atoms in the hemoglobin in order to maintain blood pH
• (HCO3) transport one CO2 molecule to the lungs

Question 2

In external respiration (air and blood), what happens?

Answer 2

• (H+) hydrogen ion detaches from hemoglobin and will react with bicarbonate ion
• (H2CO3) carbonic acid is then produced
• (H2CO3) carbonic acid reacts to form carbon dioxide and water
• (CO2) CO2 diffuses in the blood into the alveoli and will be exhaled
• H2O can do the same thing or remain in the blood

Question 3

What are the 2 ways of O2 transport?

Answer 3

1) attached to hemoglobin 99%

2) dissolved in plasma 1%