Ch. 2 West

Question 1

The volume of gas left in the lung after a normal (or tidal) expiration is termed the ____ ____ ____

Answer 1

Functional residual capacity (FRC)

Question 2

Maximal expiration is called ___ ___

Answer 2

Vital capacity

Question 3

Boyle’s law states that __ x __ is constant at a constant temperature.

Answer 3

Pressure x volume
PV = K

C1 x V1 = C2 x (V1 + V2)

Question 4

Minute ventilation = ____ x ____

Answer 4

Minute ventilation = RR x TV

Question 5

Alveolar ventilation =

Answer 5

Alveolar ventilation = minute ventilation - dead space ventilation

Dead space ventilation = RR x dead space volume

Question 6

Alveolar ventilation equation and its components

Answer 6

V(A) = [V(CO2)/P(CO2)] x K
Where V(A) = Alveolar ventilation
V(CO2) = CO2 output or production
P(CO2) = partial pressure of CO2
K = is a constant which is the total pressure

Alveolar ventilation is the volume of fresh (non-dead-space) gas entering the respiratory zone per minute.

Question 7

Physiologic dead space definition

Answer 7

A functional measurement of the volume of the lung which does not eliminate CO2

Increased in disease states (acute and chronic lung disease)

Question 8

Bohr’s method/equation of calculation of physiologic dead space

Answer 8

V(D)/V(T) = [PaCO2- P(E)CO2]/PaCO2

Question 9

The most gravity dependent lung lobes (whether a person is in standing position or supine position) ventilate (better/worse) than the less gravity dependent lung tissue

Answer 9

Better

Question 10

The concentration of CO2 (and therefore partial pressure) in alveolar gas and arterial blood is (inversely/directly) related to the alveolar ventilation.

Answer 10

Inversely