Respiratory system (2) - 22%

Question 1

What is Diffusion?

Answer 1

Diffusion occurs when particles spread.

Diffusion happens when the particles are free to move.

Particles diffuse from areas of high concentration to low concentration.

Question 2

Whats Dalton’s Law of Partial Pressures?

Answer 2

The law states that the total pressure exerted by a mixture of gases is the sum of the pressures exerted independently by each gas in the mixture.

The partial pressure of each gas is directly proportional to its % in the total gas mixture.

Question 3

Whats Henry’s Law?

Answer 3

When a mixture of gases is in contact with a fluid each gas will dissolve in proportion to its partial pressure.

The volume of gas that will dissolve in a liquid at any given partial pressure also depends on the solubility of the gas in the liquid.

http://www.youtube.com/watch?v=8yU5y-cFXoo

Question 4

What two ways is Oxygen carried?

Answer 4

98. 5% combined with haemoglobin

1. 5 % in plasma.

Question 5

What three ways in Carbon dioxide carried?

Answer 5

1. dissolved in plasma 7%-10%
2. Chemically bound to haemoglobin 20%-30%
3. As bicarbonate ion in plasma 60%-70%

Question 6

Role of Haemoglobin (Hb)

Answer 6

Each Hb molecule binds four oxygen atom in a rapid and reversible process creating oxyhemoglobin.

When the Hb relates oxygen is is called reduced haemoglobin (HHb)

Question 7

What four things affect Haemoglobin ability to attach and or detach oxygen?

Answer 7

1. partial pressure of carbon dioxide
2. temperature
3. concentration of hydrogen ions [lower pH]
4. a chemical called BPG (2,3-biphosphoglycerate)

An increase in each factors will decrease haemoglobin’s affinity for oxygen and enhance oxygen unloading from the blood.

Question 8

Transport and Exchange of Carbon Dioxide

Answer 8

https://www.youtube.com/watch?v=QP8ImP6NCk8