Respiration And Exchange Of Gases

Question 1

100 ml of blood in an adult has ___g of HB.

Answer 1

16g

Question 2

______is the only cartilage that has central aperture.

Answer 2

Cricoid cartilage.

Question 3

____ml of CO2 is transported as physical solution while ____ enters RBC’s and is transported as bicarbonate ions and carb-amino-haemoglobin.

Answer 3

7ml ; rest 93% or 93ml as bicarbonate ions and …

Question 4

___ml of oxygen binds to ____ml of arterial blood .

Answer 4

100ml ; 20ml

Question 5

About ___ml of oxygen binds to 1g of HB.

Answer 5

1.31ml

Question 6

Alveolar volume is ____while dead air space is ______.

Answer 6

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.

Question 7

As oxygen enters blood, oxygen tension of blood _____

Answer 7

Increases.

Question 8

As CO2 leaves blood, CO2 tension in blood ____at the level of alveoli.

Answer 8

Decreases.

Question 9

Collapsing of lungs due to increased pleural pressure is called

Answer 9

Atalectasis.

Question 10

Cornculates and cumiforms are collectively known as

Answer 10

Cartilages of santorini.

Question 11

Coastal breathing accounts for ___% increase in lung volume.

Answer 11

25%

Question 12

Diaphragmatic contractions account for ___% increase in lung volume.

Answer 12

75%

Question 13

Distal part of nose is m/o _____bone, middle part of _____ and tip of _____.

Answer 13

Vomer bone ; hyaline cartilage ; elastin cartilage

Question 14

Give some imp. functions of pleural fluid?

Answer 14

• shock absorber.
• friction busters
• maintains inter pleural pressure of 752-754mmHg.

Question 15

In blood vessels, Po2 is ____ and Pco2 is _____

Answer 15

40 ; 45

Question 16

In external respiration, ____moves into the blood while _____moves out.

Answer 16

Oxygen ; carbon dioxide

Question 17

In internal respiration, _____ moves into the blood and ______ moves out.

Answer 17

CO2 ; O2

Question 18

Inferior nasal conchae is formed by _______bone.

Answer 18

Inferior nasal bone.

Question 19

Inflammation of lungs is called

Answer 19

Pleurisy/pleuritis.

Question 20

Larynx is made up of ___ cartilages of ____ different types.

Answer 20

9 ; 6

Question 21

Name the bone that constitutes both nasal conchae and paranasal sinuses?

Answer 21

Ethamoid bone.

Question 22

Name the glands found in respiratory region?

Answer 22

Mucus glands and serous glands

Question 23

Name the surfaces of lungs?

Answer 23

Costal = towards ribs
Capula = top end 
Medistenal = sides b/w lungs 
Diaphragmatic = loser end

Question 24

Non breathing condition is called

Answer 24

Apnoea

Question 25

Pco2 and Po2 in systemic arteries is

Answer 25

``` Pco2= 40mmHg Po2= 95mmHg ```

Question 26

Physiological pulmonary ventilation is

Answer 26

5L | Less than 5L indicates lung malfunction

Question 27

RV is rich in CO2 or O2 ?

Answer 27

CO2 | As residual volume is foul air.

Question 28

Solubility of gases depends on ____laws.

Answer 28

Henry’s law which states that solubility of gases depends upon partial pressure of gas and solubility coefficient.

Question 29

Superior and inferior nasal conchae is made of _______bone.

Answer 29

Ethamoid bone

Question 30

The overall surface area for respiration is

Answer 30

71m cube.

Question 31

The point of bifurcation of trachea is called

Answer 31

Carina

Question 32

The point where primary bronchi enters lungs is called

Answer 32

Hilus.

Question 33

There are about _____alveoli in each lung.

Answer 33

300 million

Question 34

Thickness of ARM (alveolar respiratory membrane) is

Answer 34

Less than a mm —— NEET | 0.5 micro metres I.e 1/16th of RBC ——AIIMS

Question 35

Trachea bifurcates into primary bronchial at the level of

Answer 35

5th thoracic vertebrae

Question 36

Under strenuous conditions, ___ ml of oxygen is delivered to tissues.

Answer 36

15ml.

Question 37

Under strenuous conditions, venous blood oxygen level is

Answer 37

4.4ml/100ml of blood while it’s still 20ml/dl in arterial blood.

Question 38

Venous blood, under normal conditions carries ____ml of oxygen per 100ml.

Answer 38

15.6ml

Question 39

Vestibule of nose has got ____cilia/nasal hair while respiratory region has ____cilia.

Answer 39

Corase; quite fine

Question 40

Volume of oxygen exchanged with tissues is ___ml

Answer 40

(20-15.6ml)=5ml

Question 41

What is special about olfactory region of nose?

Answer 41

It has got schinidarian membrane which is sensory columnar epithelial cells that interprets smell.

Question 42

Which alveolar cells are tissue macrophages?

Answer 42

Dust cells/ alveolar type-III

Question 43

Which alveolar cells play role in gaseous exchange?

Answer 43

Alveolar type-I or simple squamous epithelial cells.

Question 44

Which alveolar cells produce lecithin?

Answer 44

Alveolar type-II or cuboidal cells

Question 45

Which lung volume prevents collapsing of lungs?

Answer 45

RV