Gas exchange

Question 1

Gas exchange

Answer 1

involves both external and internal respiration

Question 2

External respiration

Answer 2

oxygen is inhaled into the alveolar space

oxygen is diffuse through the alveolar wall into the capillary wall towards the red blood cell

Question 3

External respiration is done passively for two reasons

Answer 3

there are more oxygen in the alveoli than in the capillaries

Oxygen is attracted to the iron molecule in hemoglobin

Question 4

Next step in gas exchange: Carbon dioxide

Answer 4

Blood cell moves towards a muscle

Muscles use oxygen for energy which creates carbon dioxide

Question 5

Carbon dioxide diffuses into the capillaries for two reasons:

Answer 5

There are more carbon dioxide in the muscles than the capillaries
Carbon dioxide competes for space on the hemoglobin

Question 6

Carbon dioxide binds to a heme group

Answer 6

oxygen is booted off the red blood cell
the oxygen gravitates towards the muscle due to passive diffusion
allows the muscle to become resupplied with oxygen for energy which will turn into carbon dioxide

Question 7

Internal respiration

Answer 7

the exchange of oxygen and carbon dioxide within muscles and tissues

Question 8

When red blood cells return to the alveoli

Answer 8

• are now carrying carbon dioxide
• the oxygen molecules begin to move towards the –capillaries again
• taking carbon dioxide place within the hemoglobin
• Carbon dioxide naturally gravitates towards the alveolar space where it is then expelled from the airway due to expiration

Question 9

Ph

Answer 9

Carbon dioxide when mixed with water forms carbonic acid
an increase of carbon dioxide can cause an increase of acids in the blood
this can occur if there is no adequate gas exchange

Question 10

Respiratory acidosis

Answer 10

a decrease of the pH levels due to a respiratory cause

Can be a very efficient indicator of where the pH imbalance is coming from