respiartory system Flashcards
differences in pressure between air and lungs during inspiration adn expriation
inspiration-lungs need to be lower pressure than atmosphere
expiration-lungs need to be higher pressure than atmosphere
what is the passge of air
air (mixture of gases) drawn into body by nose
passes through the pharynx and onto the larynx (voicebox)
down the trachea (windpipe)
into left and right bronchus
subdivides into secondary bronchi
progressively get thinner and branch into bronchioles
lead into aveloi
what muscles contract during inspiration at rest
Diamphragm
external intercostals
study tip: DEAD at rest
what muscles used during inspiration during exercise
Pectoralis minor
External intercostals
Diaphragm
Scales
Sternomastoid
muscles used during expiration at rest
Diaphragm
External intercostals
passive: relax
study tip: same as inspritoon
dead at rest
muscles used during expiration during exercise
Abdominals
Internal intercostals
study tip: AI snapchat
tidal volume and impact during exercise
volume of air breathed in and out per breath
increases during exercise
inspiratory researve volume and impact from exercise
volume of air forcibly inspired after normal breath
decreases during exercise
expiratory reserve volume and effects from exercise
volume of air that can be forcibly expired after normal breath
slight decrease during exercise
residual volume and effects from exercise
volume of air left in lungs after max expiration
reamins the same during exercise
minute ventilation and affects during erxcise
volume of air breathed in and out per minute
big increase during exercise
what can we use to measure volume of air breathed i and out
spirometer
what is gaseous exchange concerned about
about 2 things these are
getting air from oxygen ino lings to diffuse into blood and be transported to cells of body
removal of C02 from blood
gaseous exchange at alveoli
partial pressure in alveloi is higher than partial pressure in capillery
oxygen will diffuse from alveoli into capillary until pressure is equal in both
what is the name given to the differnce in partial pressure
concentration/diffisuion gradient
bigger the gradient, faster diffusion will be
