Breathing Physics (EXAM 1)

Question 1

Quiet breathing Inhalation

Answer 1

ACTIVE PROCESS
Diaphragm/external intercostals contracts
expands T.C.
increase Lung volume
decrease alveolar pressure
INHALE

Question 2

Quiet breathing exhalation

Answer 2

PASSIVE PROCESS
Muscles of inhalation relax and elastic recoil comes into play
T.C. returns to rest
decrease lung volume
increase alveolar pressure
EXHALE

Question 3

Speech breathing Inhalation

Answer 3

ACTIVE PROCESS
Muscles of inhalation contracts
increase T.C.
increase Lung volume
decrease alveolar pressure
INHALE

Question 4

Speech breathing Exhalation

Answer 4

ACTIVE PROCESS AND PASSIVE PROCESS
Muscles of inhalation relax and elastic recoil
muscles of exhalation contract
T.C. returns to rest/gets smaller
decrease lung volume
increase alveolar pressure
EXHALE

Question 5

Boyle’s Law

Answer 5

Pressure and volume are inversely related

Question 6

Brownian Motion

Answer 6

Random air movement
Air particles go down concentration gradient, from areas of high pressure to lower pressure

Question 7

Lungs at rest/ends of inhalation and exhalation

Answer 7

Open container
equal pressure in lungs and out of lungs

Question 8

Once Lung volume increases…

Answer 8

Pressure inside of lungs DECREASE vs. pressure outside of lungs
Air goes INTO LUNGS
INHALE

Question 9

Once Lung volume decreases…

Answer 9

Pressure inside of lungs INCREASE vs. pressure outside of lungs
air goes OUT OF LUNGS
EXHALE