Lec 4 - 5 - Ventilation and Perfusion

Question 1

boyle’s law with temp constant

Answer 1

P1V1 = P2V2

Question 2

law that partial pressure in a gas mixture is the pressure that the gas would exert if it occupied the total volume

Answer 2

dalton’s law

Question 3

concentration of a gas dissolved in a liquid is proportional to its partial pressure

Answer 3

henry’s law

Question 4

constant arterial gas composition of PaCO2

Answer 4

40 mmHg

Question 5

arterial gas composition varies by blank

Answer 5

chemoreceptors

Question 6

Ve means

Answer 6

expired ventilation (minute ventilation)

Question 7

Va means

Answer 7

alveolar ventilation

Question 8

Vd means

Answer 8

dead space ventilation

Question 9

IMPORTANT: more frequent ventilation causes blank to increase but blank to decrease

Answer 9

dead space ventilation, alveolar ventilation

Question 10

base of lung has a blank pleural pressure, blank volume, blank compliance

Answer 10

higher, lower, higher

Question 11

minute ventilation formula

Answer 11

Ve = Vt x f

Question 12

physiologic dead space is wasted blank

Answer 12

ventilation

Question 13

a shunt is wasted blank

Answer 13

blood flow

Question 14

percentage of wasted air equation

Answer 14

Vpd / Vt

Vpd = physiologic dead space
Vt = total dead space

Question 15

pulmonary vascular resistance is blank times blank than system

Answer 15

10, less

Question 16

increase in height has a blank of blood pressure in pulmonary blood flow

Answer 16

decrease

Question 17

airflow =

Answer 17

ventilation

Question 18

blood flow =

Answer 18

perfusion

Question 19

ventilation perfusion ratio

Answer 19

Va / Q

**both are flows

Question 20

pulmonary arteries are blank muscular and blank compliant compared to systemic arteries which allows for lower resistance and lower pressure

Answer 20

less, more

Question 21

arterial hypoxemia has a Po2 less than blank

Answer 21

80

Question 22

hypoxia has a Po2 less than blank

Answer 22

60

Question 23

hypercapnia is a Pco2 above blank

Answer 23

40

Question 24

hypocapnia has a Pco2 less than blank

Answer 24

35

Question 25

IMPORTANT: increased Pcap leads to heart failure and lung blank

Answer 25

volume increases

Question 26

decreased Ponc which is a loss of plasma protein which can be caused by these

Answer 26

starvation, toxic shock