Respiratory System - Control of breathing Flashcards
1
Q
What is the minute volume
A
The volume of air breathed in 1 min
1m = VT (tidal volume) x freq
2
Q
The minute volume can be altered by
A
Altering the depth of breathing (VT)
Altering the rate of breathing
3
Q
Resting tidal volume is
A
~500ml
4
Q
We breathe in
A
~12-14 breaths per min
5
Q
Resting MInute volume is
A
~7 litres per min
0.5 x 14 = 7
6
Q
What is the stimulus for breath?
A
Increasing levels of CO2 in the blood and CSF
7
Q
Breakpoint is when
A
we can no longer resist the urge to take a breath
8
Q
Peripheral chemoreceptors
A
aortic bodies
carotid bodies
9
Q
Peripheral chemoreceptors have input to the brainstem via?
A
Vagus nerve
