Structure

Question 1

define oxygenation

Answer 1

absorbtion of O2 into blood stream

Question 2

define ventilation

Answer 2

excretion of CO2 into air

Question 3

define perfusion

Answer 3

entire cardiac output getting through lungs (bloodflow)

Question 4

7 functions of lung

Answer 4

1. oxygenation
2. ventilation
3. perfusion
4. sterility
5. produce surfactant
6. filter blood
7. special cell and immunologic functions

Question 5

what occurs in absence of O2

Answer 5

anaerobic metabolism

Question 6

composition of air

Answer 6

N2 - 79%
O2 - 21%
CO2 verly low

Question 7

compostion of alveolar air

Answer 7

N2 - 75%
O2 - 13%
CO2 - 5%
H2O - 6%

Question 8

what is 1 ATM in mm/hg

Answer 8

760 - wieght of 1 cm of air

Question 9

how does pressure change with alt?

Answer 9

lower at greater alt.

Question 10

formula for partial pressure

Answer 10

concentration x total pressure

Question 11

what does pp of H2O depend on and how does it change

Answer 11

temp and saturation - both increase

Question 12

what does % H2O saturation represent?

Answer 12

amount of water vapor present for the max possible at that temp

Question 13

what must all pps add up to

Answer 13

barometric pressure

Question 14

what is PH2O at 37C

Answer 14

47mmHg

Question 15

what is PH2O sig?

Answer 15

must be substracted from partial pressure calculations

Question 16

what are 2 different ways of expressing gas measures

Answer 16

1. Standard Temp and Press, Dry (STPD)

2. Body Temp and Press, Saturated (BTPS)

Question 17

2 main anatomic structures for lungs

Answer 17

1. Chest wall

2. diaphragm

Question 18

what innervated diaphragm

Answer 18

phrenic

Question 19

inspiration involves what movements of diaphragm

Answer 19

down and out

Question 20

in what direction do gases move

Answer 20

high to low pressure

Question 21

what is intrathoracic pressure on inspiration

Answer 21

-5cmH2O

Question 22

diff. between passive and active expiration

Answer 22

active- push out esp. w rectus abdo

Question 23

accesory muscles of inpiration

Answer 23

scalens, sternocleidomastoid, traps

Question 24

what does the pleura do (2)

Answer 24

1. glides

2. transmit pressure

Question 25

where does airway start

Answer 25

trachea

Question 26

path trough airways

Answer 26

bronchi>broncioles>resp. bronchioles>alveoli

Question 27

first point of gas ex

Answer 27

resp. bronch

Question 28

function of pulm arteries

Answer 28

perfusion - bring deoxy blood to lungs

Question 29

pressure in pulm art.

Answer 29

20/5

Question 30

where do lung lymph start

Answer 30

resp. bronchi - none in alveoli

Question 31

where does lymph from left lower go

Answer 31

to R side

Question 32

what drains 3/4 of lung lymph

Answer 32

R supraclavicular node

Question 33

what are the two categories of lung volumes

Answer 33

1. measurable - IC, VC, TV

2. not measurable - TLC, RV, FRC

Question 34

define tidal V

Answer 34

normal breath - 500ml

Question 35

define vital cap

Answer 35

full inspiration to full expir

Question 36

define inspiratory capacity

Answer 36

max can be inspired after normal expriation

Question 37

define funct. residual volume

Answer 37

volume left after normal expiration