Respiration And Exchange Of Gases Flashcards
100 ml of blood in an adult has ___g of HB.
16g
______is the only cartilage that has central aperture.
Cricoid cartilage.
____ml of CO2 is transported as physical solution while ____ enters RBC’s and is transported as bicarbonate ions and carb-amino-haemoglobin.
7ml ; rest 93% or 93ml as bicarbonate ions and …
___ml of oxygen binds to ____ml of arterial blood .
100ml ; 20ml
About ___ml of oxygen binds to 1g of HB.
1.31ml
Alveolar volume is ____while dead air space is ______.
350ml ; 150ml.
Out of 500ml TV only 350ml reaches alveoli and is c/d alveolar volume. The rest resides in bronchi and is c/d dead air space.
As oxygen enters blood, oxygen tension of blood _____
Increases.
As CO2 leaves blood, CO2 tension in blood ____at the level of alveoli.
Decreases.
Collapsing of lungs due to increased pleural pressure is called
Atalectasis.
Cornculates and cumiforms are collectively known as
Cartilages of santorini.
Coastal breathing accounts for ___% increase in lung volume.
25%
Diaphragmatic contractions account for ___% increase in lung volume.
75%
Distal part of nose is m/o _____bone, middle part of _____ and tip of _____.
Vomer bone ; hyaline cartilage ; elastin cartilage
Give some imp. functions of pleural fluid?
- shock absorber.
- friction busters
- maintains inter pleural pressure of 752-754mmHg.
In blood vessels, Po2 is ____ and Pco2 is _____
40 ; 45
In external respiration, ____moves into the blood while _____moves out.
Oxygen ; carbon dioxide
In internal respiration, _____ moves into the blood and ______ moves out.
CO2 ; O2
Inferior nasal conchae is formed by _______bone.
Inferior nasal bone.
Inflammation of lungs is called
Pleurisy/pleuritis.
Larynx is made up of ___ cartilages of ____ different types.
9 ; 6
Name the bone that constitutes both nasal conchae and paranasal sinuses?
Ethamoid bone.
Name the glands found in respiratory region?
Mucus glands and serous glands
Name the surfaces of lungs?
Costal = towards ribs Capula = top end Medistenal = sides b/w lungs Diaphragmatic = loser end
Non breathing condition is called
Apnoea
Pco2 and Po2 in systemic arteries is
Pco2= 40mmHg Po2= 95mmHg
Physiological pulmonary ventilation is
5L
Less than 5L indicates lung malfunction
RV is rich in CO2 or O2 ?
CO2
As residual volume is foul air.
Solubility of gases depends on ____laws.
Henry’s law which states that solubility of gases depends upon partial pressure of gas and solubility coefficient.
Superior and inferior nasal conchae is made of _______bone.
Ethamoid bone
The overall surface area for respiration is
71m cube.
The point of bifurcation of trachea is called
Carina
The point where primary bronchi enters lungs is called
Hilus.
There are about _____alveoli in each lung.
300 million
Thickness of ARM (alveolar respiratory membrane) is
Less than a mm —— NEET
0.5 micro metres I.e 1/16th of RBC ——AIIMS
Trachea bifurcates into primary bronchial at the level of
5th thoracic vertebrae
Under strenuous conditions, ___ ml of oxygen is delivered to tissues.
15ml.
Under strenuous conditions, venous blood oxygen level is
4.4ml/100ml of blood while it’s still 20ml/dl in arterial blood.
Venous blood, under normal conditions carries ____ml of oxygen per 100ml.
15.6ml
Vestibule of nose has got ____cilia/nasal hair while respiratory region has ____cilia.
Corase; quite fine
Volume of oxygen exchanged with tissues is ___ml
(20-15.6ml)=5ml
What is special about olfactory region of nose?
It has got schinidarian membrane which is sensory columnar epithelial cells that interprets smell.
Which alveolar cells are tissue macrophages?
Dust cells/ alveolar type-III
Which alveolar cells play role in gaseous exchange?
Alveolar type-I or simple squamous epithelial cells.
Which alveolar cells produce lecithin?
Alveolar type-II or cuboidal cells
Which lung volume prevents collapsing of lungs?
RV
