Respiratory System & Atmosphere Flashcards
1
Q
Respiration
A
Exchange of gases between body and environment
2
Q
Muscles of respiration
A
Diaphragm and intercostal muscles
3
Q
Total volume (normal breath)
A
500 cm3
4
Q
Inspiratory reserve volume
A
3000 cm3
5
Q
Expiratory reserve volume
A
1100 cm3
6
Q
Residual volume
A
1200 cm3
7
Q
Internal respiration
A
Converts inhaled O2 into CO2
8
Q
What makes blood acidic?
A
CO2 + H2O = H2CO3
9
Q
What happens in excess H2CO3?
A
- Excessive acidity
- Breathing rate, BP and heart rate increase (homeostasis)
10
Q
What do central chemoreceptors do?
A
- Increase rate of respiration
- Decrease CO2, increase O2
11
Q
Hypoxia
A
- Deficiency in O2 supply to brain tissues
- Causes imbalance in homeostasis
12
Q
Hypoxic hypoxia
A
- Low arterial PO2
13
Q
Anemic hypoxia
A
- Decrease in total O2 bound to haemoglobin
- Causes :
- Blood loss
- CO3 poisoning
14
Q
Severity determining factors of hypoxia
A
- Altitude
- Time of exposure
- Temperature
- Exercise
15
Q
Initial symptoms of hypoxia
A
- Tingling
- More breathing
- Headache, nausea etc.
- Mood change
