RESPIRATORY PHYSIO

Question 1

amount of air that can be

exhaled from the lung from TLC to RV

Answer 1

FVC

Question 2

amount of that FVC that can

be exhaled in the 1st second

Answer 2

FEV1

Question 3

the percentage of FVC that

can be exhaled in 1 sec

Answer 3

FEV1/FVC ratio

Question 4

Normal FEV1/FVC?

Answer 4

between 0.7 and 0.8

you should be able to exhale 70-80% of your VC in 1 sec

Question 5

FEV1/FVC below 0.7 is a marker of?

Answer 5

airway obstruction

Question 6

Patients with restrictive lung disease have a normal FEV1/FVC ratio? T/F

Answer 6

True

Question 7

measures lung’s ability to transfer gas from inspired air to the bloodstream?

Answer 7

DLCO

Question 8

Low DLCO seen in?

Answer 8

COPD w/ emphysema

thickening of alveolar capillary membrane

Question 9

High DLCO seen in?

Answer 9

obesity

asthma

Question 10

this facilitates the release of CO2 into alveoli?

Answer 10

carbaminohemoglobin

Question 11

respiratory center regulated by?

Answer 11

apneustic center
peripheral chemoreceptor
central chemoreceptor
lung stretch receptor 
muscle and joint receptor 
pneumotaxic center

then effects diaphragm

Question 12

mechanoreceptors like lung receptors consist of?

Answer 12

pulmonary stretch receptors
irritant receptors
J receptors

Question 13

the major stimulus for activation of the peripheral chemoreceptors?

Answer 13

hypoxemia, less response to pH

Question 14

the major stimulus for central

chemoreceptors?

Answer 14

Acidemia, Hydrogen ions

Question 15

muscles affected by the respiratory center?

Answer 15

diaphragm
intercostal muscles
abdominal muscles
scalene and scm muscles (accessory muscles of respiration)

Question 16

chemoreceptors are a stimulus to?

Answer 16

the cardioaccelerator and vasomotor centers (increase cardiac output and constriciotn of peripheral vessels)