Dr. Jones: Gas exchange and transport (Mayson's set)

For diffusion across the alveolar membrane, what is needed for good flux? SATA

• A large surface area

• A small surface area

What happens during the gas exchange between alveoli and blood? SATA

• Oxygen diffuses into the blood

• Carbon dioxide diffuses into the blood

• Oxygen diffuses into the alveoli

• Carbon dioxide diffuses into the alveoli

Why is there a lower partial pressure on the venous side?

• Because the veins are larger and provide less pressure.

• Because the veins don't need as much pressure

• Because the blood that is in the venous side has been used by the tissues

• Because it is farther from the heart and the pressure is lower.

What does Henry's law state?

• An object in motion will stay in motion

• at a water and water interface, the amount of liquid which will dissolve is determined by the partial pressure of the gases in the air.

• at an air water interface, the amount of gas which will dissolve is determined by the partial pressure of the gases in the air and the solubility in water

• at an air and air interface, the amount of gas which will dissolve is determined by the partial pressure of the gases in the air.

Which of the following has better solubility in water?

• CO2

• O2

How many O2 molecules can bind to a single hemoglobin?

• 2

• 3

• 4

• 5

Why is hemoglobin important? SATA

• It increases the O2 content in the plasma.

• It's not that important, we can maintain O2 levels without Hemoglobin's help

• Due to O2's low water solubility we need hemoglobin to carry oxygen so that the plasma can maintain life sustaining O2 levels.

• Hemoglobin directly changes Oxygen's configuration so that it may become more water soluble.

What determines hemoglobin binding affinity? ( Saturation)

• Palv

• PCO2

• PO2

• Patm

Where is hemoglobin's binding affinity the highest?

• Lungs

• tissues

Why is hemoglobin's binding affinity lower in the tissues compared to the lungs?

• The tissues facilitate unloading of oxygen molecules.

• The lungs facilitate unloading of oxygen molecules.

• The tissues are more efficient at binding to O2 so they do not need hemoglobin.