Respiratory

Question 1

Law of LaPlace describes the relationship between what 3 things?

Answer 1

pressure
radius
wall tension

(increased radius = increased wall tension)

Question 2

the tendency of an alveolus to collapse is DIRECTLY proportional to

Answer 2

surface tension

Question 3

the tendency of an alveolus to collapse is INVERSELY proportional to

Answer 3

radius

Question 4

Zone 1
(dead space)

Answer 4

PA > Pa > Pv

VQ = infinity

Question 5

Zone 2
(waterfall)

Answer 5

Pa > PA > Pv

VQ = 1

Question 6

Zone 3
(shunt)

Answer 6

Pa > Pv > PA

VQ = 0

Question 7

Zone 4
(pulmonary edema)

Answer 7

Pa > Pis > Pv > PA

Question 8

T/F: surfactant decreases surface tension

Answer 8

true :)

Question 9

Formula for the Law of LaPlace

Answer 9

P = 2T/R

Question 10

IRV

Answer 10

3000ml (3L)

amount forcibly inhaled above tidal volume

Question 11

vT

Answer 11

500cc

normal tidal breathing

Question 12

ERV

Answer 12

1100 ml

amount forcibly exhaled below tidal volume

Question 13

RV

Answer 13

1200 ml

amount remaining in lungs after complete exhalation

(cannot be exhaled)

Question 14

CV

Answer 14

variable

volume above RV where the small airways begin to close

Question 15

TLC

Answer 15

5.8L

IRV + vT + ERV + RV

Question 16

VC

Answer 16

4.5 L

IRV + vT + ERV

Question 17

IC

Answer 17

3.5 L

IRV + vT

Question 18

FRC

Answer 18

2.3 L

ERV + RV

Question 19

CC

Answer 19

variable

RV + CV

Question 20

Spirometry cannot measure RV

therefore, you cannot measure which two capacities?

Answer 20

TLC
FRC

Question 21

FRC (cc/kg)

Answer 21

35 cc/kg

Question 22

T/F: closing volume and capacity are dynamic measurements that assess small airway closure. they also cannot be measured with spirometry

Answer 22

true