PSIO 2.3-2.4

What is Dalton's Law?

• In a mixture of gases, each gas will exert a pressure that
  is proportional to its concentration

• In a mixture of gases, each gas will exert a pressure that
  is disproportional to its concentration

Calculate the partial pressure of oxygen:

Atmospheric pressure: 705mmHg

• 553 mmHg

• 700 mmHg

• 148 mmHg

• 163 mmHg

Which of the following values are correct for deoxygenated blood partial pressures of oxygen and carbon dioxide?

• PO2 = 40mmHg

  PCO2 = 60mmHg

• PO2 = 40mmHg

  PCO2 = 45mmHg

• PO2 = 100mmHg

  PCO2 = 40mmHg

• PO2 = 45mmHg

  PCO2 = 40mmHg

Which of the following values are correct for oxygenated blood partial pressures of oxygen and carbon dioxide?

• PO2 = 40mmHg

  PCO2 = 60mmHg

• PO2 = 40mmHg

  PCO2 = 45mmHg

• PO2 = 100mmHg

  PCO2 = 40mmHg

• PO2 = 45mmHg

  PCO2 = 40mmHg

Expired air has a ___ [O 2] & a
___ [CO 2] than inspired air.

• lower; lower

• higher; lower

• lower; higher

• higher; higher

O2 leaves the lungs and enters capillary blood flow during inspiration.

• True

• False

CO2 moves
from the blood to the lungs and
is exhaled.

• True

• False

In gas exchange, what does O2 do at the tissues?

• nothing

• turns into CO2

• leaves the cells and diffuses into the capillary

• leaves the
  capillary and diffuses into the cells

During gas exchange, what does CO2 do in at the tissues?

• leave the tissues and enter the capillary

• leaves the capillary and enters the tissue

• turns into O2

• nothing

What is the result of gas exchange at the tissues?

• higher venous CO2 and higher venous O2

• higher venous CO2 and lower venous O2

• lower venous CO2 and lower venous O2

• lower venous CO2 and higher venous O2