Partial pressure gradients of O2 and CO2

Question 1

What are the units of pressure?

Answer 1

• 1atm = 760 mm Hg = 760 torr = 101.3 kPa

Question 2

What is daltons law of partial pressure?

Answer 2

• P(atmosphere) = P(N2) + P(O2) + P(CO2) + P(water) + P(other)

Question 3

What % of N2 is in the atmosphere?

Answer 3

• 79%

Question 4

What % of O2 is in the atmosphere?

Answer 4

• 21%

Question 5

What % of CO2 is in the atmosphere?

Answer 5

• > 0.1%

Question 6

How would you calculate P(O2) in torr?

Answer 6

P(O2) = 0.21 (% O2 in air) * 760 torr = 159 torr

Question 7

O2 and CO2 diffuse from ____ P(gas) to ___ P(gas)

Answer 7

• high to low

Question 8

What direction does O2 move in the body?

Answer 8

• UPTAKE = water –> blood (gill)
• DELIVERY = blood –> tissue (muscle)

Question 9

What direction does CO2 move in the body?

Answer 9

• UPTAKE = tissue –> blood
• DELIVERY = blood –> gill

Question 10

What is anoxia?

Answer 10

• no O2

Question 11

What is hypoxia?

Answer 11

• low O2

Question 12

What is normoxia?

Answer 12

• saturated in O2

Question 13

Solubility ____ with increase in temp

Answer 13

• decreases

Question 14

In seawater, solubility ___ for O2 __%.

Answer 14

• decreases 17%