Lecture 4 Flashcards
Cardiorespiratory : Intro
what in the blood needs to be regulated at all times
- pressure
- volume
- content = especially PaCO2 and PaO2
- temperature
how is the blood regulated
- behaviour
- breathing
- controlling blood flow
- sweating
- blood volume
what is the A stand for in cardiorespiratory terminology
A = Alveolar
what is the a stand for in cardiorespiratory terminology
a = Arterial
what is the v stand for in cardiorespiratory terminology
v = Venous
what does a dot over top of the V mean
rate
e,g VO2 with a dot above the V
what is hyperpnoea
increased ventilation
what is hyperventilation
over breathing (indicated by PaCO2)
what is the respiratory role of the pulmonary system
primarily to oxygenate blood and eliminate CO2 from cellular respiration, is mediated by ventilation of alveoli
what is the order of airways and branching starting largest to smallest
trachea
bronchi
bronchioles
terminal bronchioles
alveolar ducts
alveoli
what are alveoli covered in
surfactant
what is the average work of breathing during exercise and rest
rest = 3% energy usage
max exercise = ~12 - 24% energy usage
what are the measures of ventilatory performance
FVC = can be smaller than VC because of airway closure
FEV1 = time dependant, therefore relates well to exercise
