Gas Exchange

Question 1

Dalton’s law of partial pressure

Answer 1

Each gas in a mixture exists in its own pressure, which is proportional to the total value

Question 2

External respiration

Answer 2

Gases are exchanged between the alveoli and the blood in the capillaries

Question 3

Air entering the alveoli’s

Answer 3

Air entering the alveoli’s has a high O2 concentration and the blood has a low O2 concentration so O2 diffuses into the blood
-30% occurs by facilitated diffusion
-where no energy is expended but gas exchange is sped up

Question 4

Internal respiration

Answer 4

Occurs when oxygen and carbon dioxide are exchanged in the tissues

Question 5

Oxygen in the blood is transported in two ways

Answer 5

1) 99% of the time by hemoglobin
2) 1% is dissolved in the blood