Breathing N Exchange Part 2 Flashcards
Volume of air inspired or expired during normal respiration is called
Tidal volume , 500 ml approx
A healthy mam can inspire or expired how much air per minute
6000 to 8000 ml
Additional volume of air a person can inspire by forcible inspiration is called & how much is it
Inspiratory reserve volume , 2500 to 3000ml
Additionall volume of air a person can expire forcibly is called & how much
Expiratory reserve volume , 1000 to 1100ml
In relaxed position shape of diaphragm is
Dome shaped
Volume of Ir remaining in lungs after forcible expiration is called & how much
Residual volume ,1100 to 1200ml
Total volume of air a person can inspire after normal expiration is & it’s formula
Inspiratory capacity , TV+ IRV
Total volume of Ir a person can expire after normal inspiration is & formla
Expiratory capacity , TV + ERV
Max volume of air a person can breathe after forced expiration or the max volume of air a person can breathe out after forced inspiration & it’s formula
ERV+TV+IRV
Tota volume of air remained in lung after normal expiration
Functional residual capacity , ( ERV+TV)
Total volume of air accumulated in lungs after end of forced inspiration
RV+ERV+TV +IRV/ VC+RV
Alveoli are the
Primary sites of exchange of gases
Oxygen and carbon dioxide are exchanged based on
Pressure and concentration gradients
Rate of diffusion is affected by
- Conc
- Pressure
- Thickness of membrane
- Solubility of gases
Pressure contributed by a individual gas in a mixture of gases is called
Partial pressure
What is the pressure of oxygen in alveoli and atmosphere
104 , 159 mmhg
Co2 in alveoli in atmosphere and deoxygenated blood
0.3 ,45
Oxygen pressure in oxygenated blood and tissue
95,40
Co2 in oxygenated blood
40mmhg
Alvelous —->pulmonary ___——> systemic arteries——> ______——-> _____——-> pulmonary ____—–> lungs
- Vein
Tissues
Systemic veins
Pulmonary artery
Solubility of co2 is how much times higher than oxygen
20 -25 times
Diffusion occurs via how many layers
Three
Thin squamous epithelium of alvelous
Endothelium of arteries
Basement membrane ( thin , surrounds single layer of endothelium of capillary cells)
Thickness of three membranes is
Less than a millimetre
How much percentage of oxygen is tranpoted viablood n plasma
97, 3
Co2 is transported by blood bicarbonates and plasma by how much
20 -25 , 70 , 7
Haemoglobin n oxygen bind in
Reversible manner
Binding of oxygen is primarily due to
Partial pressure of oxygen
The factors which affect primarily binding of oxygen
Partial pressure of oxygen
Secondary factors affecting oxygen binding
Pco2, hydrogen conc , temp
Curve of percentage saturation of oxygen vz partial pressure of oxygen in mmhg
Sigmoid curve
Every 100ml of blood transports how much oxygen n carbon dioxide
5,4 ml
Co2+ haemoglobin
Carbaminohaemoglobin
Oxygen+ haemoglobin
Oxyhaemoglobin
Binding of co2 is affected by
Partial pressure of oxygen
Rbcs contains an enzyme in minute quantity and in plasma too. This facilitates
Caronic ahydrase , co2+h20= h2c03= hco3- + h+
A special centerin medulla called
Respiratory rhythm center (primary for respiration)
Pons region has
Pneumotacic center
