Respiratory Flashcards
1
Q
What is the physiological effect of raised 2,3-DPG?
A
- Stops oxygen from binding to haemoglobin as easily
- Easier oxygen release into the tissues
2
Q
Which way does raised 2,3-DPG shift the oxygen dissociation curve?
A
To the right
3
Q
Which way does low pCO2 (hypocapnia) shift the oxygen dissociation curve?
A
To the left
4
Q
Which way does the presence of methaemoglobin shift the oxygen dissociation curve?
A
To the left
5
Q
What is methaemoglobin?
A
The iron in this molecule is ferric (Fe3+) not ferrous (Fe2+), and cannot bind to oxygen.
6
Q
What pathogen causes the majority of cases of bronchiolitis?
A
Respiratory syncytial virus (RSV)
7
Q
What is bronchiolitis characterised by?
A
Acute bronchiolar inflammation
8
Q
How is the majority of carbon dioxide transported in the blood?
A
Bound to haemoglobin as bicarbonate ions
