23

Question 1

what drives air in and out of lungs

Answer 1

pressure difference

Question 2

what leads to pressure differece

Answer 2

volume difference

Question 3

how do we measure lung function

Answer 3

spirometry

Question 4

what’s tidal volume

Answer 4

movement of air in and out at rest

Question 5

forced vital capacity meaning and equation

Answer 5

max air inspired and max expired as fast as possible

Forced vital capacity = Inspiratory reserve capacity + tidal volume + expiratory reserve volume

Question 6

whats inspiratory reserve volume

Answer 6

Volume of air you can draw into your lungs ​

Question 7

whats expiratory reserve volume

Answer 7

Volume of air you can get out of your lungs ​

Question 8

whats FEV1

Answer 8

forced expiratory volume in 1 sec

Question 9

what ratio is important to measure lung function

Answer 9

FEV1/FVC

Question 10

normal range of values for FEV1/FVC

Answer 10

70-80%

Question 11

what condition would decrease FEV1/FVC

Answer 11

asthma

Question 12

can asthma people reach the same Peak Expiratory volume

Answer 12

yes

Question 13

can asthma people reach the same FVC

Answer 13

with bronchiolators our

Question 14

muscles generate the pressure differences for breathing

Answer 14

respiratory muscles not lung muscles

Question 15

muscles involved in inspiration

Answer 15

diaphragm and external intercostal muscle

Question 16

muscles involved in expiration

Answer 16

passive

elastic recoil of lungs

Question 17

muscles involved in forced breathing

Answer 17

diaphragm EIM, accessory muscles (pectorals major and minor and serrates anterior and scalene)

Question 18

whats the size of the diaphragm central tendon during quiet breathing? and force?

Answer 18

1-2

less than 10

Question 19

which part of rib does the pump handle movement

Answer 19

anterior end

Question 20

what part of rib does the bucket handle movement

Answer 20

lateral

Question 21

muscles for forced expiration

Answer 21

Anterior abdominal muscles & quadratus lumborum

Question 22

Alveolar ventilation:

Answer 22

portion of the total ventilation that reaches the alveoli and participates in gas exchange​

Question 23

where is anatomical dead space found

Answer 23

volume of air in the mouth, pharynx, trachea and bronchi up to the terminal bronchioles

Question 24

volume of anatomical dead space

Answer 24

150 ml

Question 25

alveolar dead space

Answer 25

alveoli that have insufficient blood supply to act as effective respiratory membranes​

Question 26

Physiological dead space

Answer 26

= Anatomical dead space + Alveolar dead space​

Question 27

how to calculate alveolar ventilation

Answer 27

(Tidal volume –dead space) X respiratory rate 4.2L/min