CRNA BOARDS - Physics, Chemistry, Math questions
and answers Latest Update 2025/2026 GRADED A+
What is responsible for a gases vapor pressure? - Temperature
From greatest to least, what are the vapor pressures of the inhaled anesthetic
agents? - Nitrous Oxide - XDesflurane - 669 mmHgHalothane - 244
mmHgIsoflurane - 240 mmHgEnflurane - 172 mmHgSevoflurane - 170 mmHDenise
Has Intercourse Every Sunday
What is Dalton's Law of Partial Pressures?Why do we care? - The total pressure
exerted by a mixture of gases is equal to the sum of the partial pressures of each
individual gas.This means you can calculate the final percent concentration of a
mixture of gas if you know the pressure of Oxygen at sea level and the partial
pressure of the other gases.
What is the partial pressure of oxygen at sea level? - 14.7 PSI760 mm Hg760 torr1
atm101 kPa
If isoflurane is added to a flask of oxygen what is the percentage concentration of
both isoflurane and oxygen? - Oxygen Partial Pressure = 760Isoflurane Partial
Pressure = 240After adding Isoflurane to the flask, the partial pressure of oxygen is
now 520 mmHg.% Oxygen = (520/760) = 69%% Isoflurane = (240/760) = 31%It
really is just that easy.
,CRNA BOARDS - Physics, Chemistry, Math questions
and answers Latest Update 2025/2026 GRADED A+
If you add Desflurane to a flask of Oxygen, what is the percentage concentration
of both Desflurane and oxygen? - Oxygen Partial Pressure = 760 mmHgDesflurane
Partial Pressure = 669 mmHgAfter adding Isoflurane to the flask, the partial
pressure of oxygen is now 91 mmHg% Oxygen = () = 11%% Desflurane =
() = 89%It really is just that easy.
What happens if a volatile agent with a higher vapor pressure is added to a
vaporizer calibrated for a lower vapor pressure? - The concentration delivered will
be higher than normal.Higher Lower High - HLH
What happens if a volatile agent with a lower vapor pressure is added to a
vaporizer calibrated for a higher vapor pressure? - The concentration delivered
will be lower than normal.Lower Higher Low - LHL
What is Graham's Law? - Diffusion is inversely proportional to the square root of
the substance's molecular weight.That is, the larger the molecule, the slower the
diffusion.Reflected in Fick's Law
What is the relationship between the solubility of Carbon Dioxide and Oxygen? -
Carbon Dioxide is larger than Oxygen (and heavier), but diffuses about 20 times as
quickly across membranes because it is twenty times more soluble.Fick's Law
, CRNA BOARDS - Physics, Chemistry, Math questions
and answers Latest Update 2025/2026 GRADED A+
What is the definition of equilibration of a gas over a membrane partition? - When
the partial pressure of the gas is equal on both sides
What is required for a gas to diffuse across a membrane? - A partial pressure
gradient
What are the main factors for determining diffusion rate for non-gases? -
1) Concentration / Electrochemical Gradient2) Lipid
Solubility3) Size of the Molecule
What are the characteristics of substances that do not easily cross the placental or
BBB? - 1) Lipid insoluble (Hydrophilic)2) Large (high molecular
weights / protein bound)3) Ionized
What is the Beer-Lambert law? - Describes how the intensity of light is altered
when transmitted through a liquid.This is the foundation for pulse oximetry as the
light is able to distinguish between hemoglobin saturated with oxygen and
hemoglobin that is empty.
and answers Latest Update 2025/2026 GRADED A+
What is responsible for a gases vapor pressure? - Temperature
From greatest to least, what are the vapor pressures of the inhaled anesthetic
agents? - Nitrous Oxide - XDesflurane - 669 mmHgHalothane - 244
mmHgIsoflurane - 240 mmHgEnflurane - 172 mmHgSevoflurane - 170 mmHDenise
Has Intercourse Every Sunday
What is Dalton's Law of Partial Pressures?Why do we care? - The total pressure
exerted by a mixture of gases is equal to the sum of the partial pressures of each
individual gas.This means you can calculate the final percent concentration of a
mixture of gas if you know the pressure of Oxygen at sea level and the partial
pressure of the other gases.
What is the partial pressure of oxygen at sea level? - 14.7 PSI760 mm Hg760 torr1
atm101 kPa
If isoflurane is added to a flask of oxygen what is the percentage concentration of
both isoflurane and oxygen? - Oxygen Partial Pressure = 760Isoflurane Partial
Pressure = 240After adding Isoflurane to the flask, the partial pressure of oxygen is
now 520 mmHg.% Oxygen = (520/760) = 69%% Isoflurane = (240/760) = 31%It
really is just that easy.
,CRNA BOARDS - Physics, Chemistry, Math questions
and answers Latest Update 2025/2026 GRADED A+
If you add Desflurane to a flask of Oxygen, what is the percentage concentration
of both Desflurane and oxygen? - Oxygen Partial Pressure = 760 mmHgDesflurane
Partial Pressure = 669 mmHgAfter adding Isoflurane to the flask, the partial
pressure of oxygen is now 91 mmHg% Oxygen = () = 11%% Desflurane =
() = 89%It really is just that easy.
What happens if a volatile agent with a higher vapor pressure is added to a
vaporizer calibrated for a lower vapor pressure? - The concentration delivered will
be higher than normal.Higher Lower High - HLH
What happens if a volatile agent with a lower vapor pressure is added to a
vaporizer calibrated for a higher vapor pressure? - The concentration delivered
will be lower than normal.Lower Higher Low - LHL
What is Graham's Law? - Diffusion is inversely proportional to the square root of
the substance's molecular weight.That is, the larger the molecule, the slower the
diffusion.Reflected in Fick's Law
What is the relationship between the solubility of Carbon Dioxide and Oxygen? -
Carbon Dioxide is larger than Oxygen (and heavier), but diffuses about 20 times as
quickly across membranes because it is twenty times more soluble.Fick's Law
, CRNA BOARDS - Physics, Chemistry, Math questions
and answers Latest Update 2025/2026 GRADED A+
What is the definition of equilibration of a gas over a membrane partition? - When
the partial pressure of the gas is equal on both sides
What is required for a gas to diffuse across a membrane? - A partial pressure
gradient
What are the main factors for determining diffusion rate for non-gases? -
1) Concentration / Electrochemical Gradient2) Lipid
Solubility3) Size of the Molecule
What are the characteristics of substances that do not easily cross the placental or
BBB? - 1) Lipid insoluble (Hydrophilic)2) Large (high molecular
weights / protein bound)3) Ionized
What is the Beer-Lambert law? - Describes how the intensity of light is altered
when transmitted through a liquid.This is the foundation for pulse oximetry as the
light is able to distinguish between hemoglobin saturated with oxygen and
hemoglobin that is empty.
