Gas Exchange Flashcards
1
Q
How many oxygen molecules can haemoglobin hold
A
4
2
Q
Define affinity
A
The degree in which a substance tends to combine with another
3
Q
When is the haemaglobin more likely to offload
A
When oxygen is low
4
Q
What is external respiration
A
Respiration between alveoli and blood in pulmanory capillaries
5
Q
What is internal respiration
A
Respiration between cells in tissues and systematic capilleries
6
Q
What is daltons law
A
Total pressure in a mixture of gases is the sum of each gases pressure
7
Q
Define partial pressure
A
The pressure of each gas
8
Q
what happens to co2 and o2 when you hold your breath
A
co2 rises and o2 falls
9
Q
how are co2 levels monitored in the blood
A
chemoreceptors found in the aortic branch, carotid artery and medulla by monitoring h+ ions
10
Q
A
