MDCAT BIOLOGY-Life Processes:Gasesous Exchange (SMART INSTITUTE)

A detailed illustration of the human respiratory system showcasing alveoli, bronchial tubes, and gas exchange processes, with vibrant colors and labels for educational purposes

MDCAT Biology: Gaseous Exchange Quiz

Test your knowledge on the human respiratory system and gaseous exchange processes with our comprehensive MDCAT Biology quiz! Designed for students and biology enthusiasts alike, this quiz includes a variety of questions that cover key concepts and functions of the respiratory system.

Highlights of the quiz:

Multiple choice questions focused on gaseous exchange
Covers a range of topics including lung structure and respiratory functions
Ideal for MDCAT preparation and biology revision

60 Questions15 MinutesCreated by BreathingBird123

01-At normal alveolar ventilation, the respiratory center is stimulated by:

O2 concentration in venous blood

CO2 concentration in arterial blood

CO2 concentration in venous blood

O2 concentration in arterial blood

02-All of the following is lined by with mucous membrane of ciliated epithelium except:

Nasal cavity

Bronchi

Trachea

Bronchioles

03-Oxygenated blood from lungs is carried to the heart by:

Pulmonary arteries

Pulmonary veins

Coronary veins

Pre-cavals

04-In terrestrial mammals, the movements for ventilation are governed by:

Abdominal muscles

Skeletal muscles

Diaphragm

Diaphragm and intercostals

05-Residual volume in the lungs of a human during exercise is:

0.5 L

3-4.5 L

1 L

1.5 L

06-In human beings, CO2 concentration in the inspired and expired air is respectively:

0.0 % and 5.3 %

0.4 % and 5.0 %

0.4 % and 4.0%

0.03% and 4.0%

07-Vocal cords are ..... Bands stretched across the mucous membrane in the glottis.

Two thick edged cartilaginous

Two thin edge muscular

Two thin edge fibrous

Two pairs of thick edge fibrous

08-Air is warmed as it passes through:

Nasal cavities

Trachea

Bronchi

Alveoli

09-WOF diverts food mass away from the opening of larynx?

Esophageal sphincter

Respiratory valve

Epiglottis

Soft palate

10-Lungs are spongy because of presence of millions of:

Bronchi

Parabronchi

Alveoli

Air sacs

11-Surfactant is present in:

Alveoli

Bronchi

Bronchioles

All of above

12-All of the following play a protective role in respiratory passage except:

Macrophages

Hair and mucous

Ciliated epithelium

Lymphocytes

13-Total inside capacity of lungs:

0.5 L

5000 mL

1.5L

14-The decrease in pH blood has ........... Effect on the oxygen carrying capacity of haemoglobin.

Positive

Negative

No effect

First negative than positive

15-Vocal cords are stretched across:

Larynx

Pharynx

Glottis

Bronchi

16-A structure that does not contain cartilage:

Alveolar duct

Alveoli

Alveolar sacs

All of above

17-Smooth muscles are present in all except:

Trachea

Bronchioles

Bronchi

Alveoli

18-It is now estimated that 90 % of lung cancer is caused by:

Air pollution

Genetically

Oncovirus

Smoking

19-Each nasal cavity is divided into ...... Passage ways.

20-Nasal cavity is lined with:

Columnar epithelium

Ciliated epithelium

Squamous epithelium

Cuboidal epithelium

21-How many functional pairs of vocal cords are present in humans:

22-Trachea lies ......... To oesophagus.

Dorsal

Ventral

Medial

Lateral

23-Return of lymph from lower leg is assisted by:

Lymph nodes

Calf muscles

Veinous valves

Cytokines

24-All are respiratory disorders except:

Pulmonary tuberculosis

Rickets

Emphysema

Lung cancer

25-In heavy smokers, the alveoli become enlarged and damaged which reduces the surface area for the exchange of respiratory gases. This condition is called:

Lung cancer

Asthma

Emphysema

Bronchioles

26-Pigment present in muscles has all characteristics except:

Can bind to four oxygen molecules

Only one polypeptide chain

Single haeme group

Copper is present

27-What is true about haemoglobin:

It is dipeptide and present in RBC

It is present in dissolved state in blood plasma

It is dipeptide in mammals and localized in RBC

It is having Haeme group

28-Rings present in trachea which prevent it from collapsing and keep the air passage way open, are:

O shaped

D shaped

C shaped

G shaped

29-Pleura is a thin membranous sac covers lungs with:

Single layer

Double layer

Triple layer

Pair of double layer

30-How many oxygen molecules can bind to muscle haemoglobin?

31-WOF is not carried by haemoglobin?

Oxygen

Carbon dioxide

Bicarbonate

Carbon monoxide

32-WOF incorrectly explains the binding of inorganic component in structures found in erythrocytes?

CO with organic portion of haem

O2 with Fe++ of haem

CO2 with NH2 group of haemoglobin

H+ with COOH group of haemoglobin

33-Partial pressure of O2 in alveolar sacs during inhalation is:

158 mmHg

115 mmHg

Less than 100 mmHg

60 mmHg

34-Percentage of O2 transported through plasma

3 %

70 %

97 %

30 %

35-The process of bringing oxygenated air into contact with a gas exchange surface is:

Ventialtion

Photorespiration

Gas transport

Respiration

36-What is the residual volume of air which always remains inside the lungs of human:

3.5 L

5 L

0.5 L

1.5 L

37-The number of oxygen atoms in haemoglobin are:

38-Respiratory system is derived from:

Ectoderm

Mesoderm

Endoderm

None of these

39-The mode of respiration in a mammal is:

Mucosal

Tracheal

Cutaneous

Pulmonary

40-Which is correct sequence of the air passage in man?

Nasal cavity-pharynx-trachea-larynx-bronchi-bronchioles-alveoli

Nasal cavity-pharynx-larynx-trachea-bronchi-bronchioles-alveoli

Nasal cavity-larynx-pharynx-trachea-bronchi-bronchioles-alveoli

Nasal cavity-larynx-bronchi-pharynx-trachea-bronchioles-alveoli

41-Food and air pathways are divided at:

Larynx

Pharynx

Stomach

Esophagus

42-WOF statements is correct?

Inspiration is an active process

Expiration is an active process

Inspiration is a passive process

Both expiration and inspiration are passive processes

43-During expiration, the diaphragm becomes:

Normal

Flattened

Oblique

Dome shaped

44-WOF conditions is responsible for increase in ventilation rate of lungs?

Decrease in O2 content of inhaled air

Decrease in O2 content of exhaled air

Increase of CO2 content in inhaled air

Increase of CO2 content in exhaled air

45-The maximum amount of air that our lung can normally hold is:

Vital capacity

Tidal capacity

Total lung capacity

Pulmonary capacity

46-WOF is capable of carrying oxygen?

Blood

Serum

Lymph

Plasma

47-Which one is mismatched?

Haemoglobin-frog

Haemoglobin-snail

Myoglobin-mollusca

Haemoglobin-man

48-WOF shows maximum solubility in blood plasma?

Oxygen

Nitrogen

Carbon dioxide

Carbon monoxide

49-Carbonic anhydrase is found in high concentration in:

Erythrocytes

Leucocytes

Lymphocytes

Blood plasma

50-During an asthma attack, a person has difficulty in breathing because of the contraction of:

Trachea

Bronchi

Alveoli

Terminal bronchioles

51-Diffusion of respiratory gases is inversely proportional to:

Surface area

Difference in concentration

Thickness of the membrane

Presence of moisture

52-WOF function is not given to air passing through nasal cavity??

Filtration

Moistening

PH adjustment

Temperature

53-A complex cartilaginous structure surrounding the upper end of the trachea:

Larynx

Pharynx

Esophagus

Epiglottis

54-A muscularly controlled cartilage, hinge-like action and serves as a lid which automatically covers the opening of the larynx is called:

Epiglottis

Uvula

Esophageal sphincter

Respiratory valve

55-Opening from nose to throat is closed by:

Epiglottis

Soft palate

Esophageal sphincter

Tongue

56-Cavity bounded by ribs and diaphragm is called:

Abdominal cavity

Pelvic cavity

Thoracic cavity

Pleural cavity

57-Bronchioles are cartilage less tubules having largest diameter of:

1 mm

1 μm

0.1 mm

1 nm

58-Bronchioles are made up mainly:

Connective tissue

Circular smooth muscles

Goblet cells

Endothelial cells

59-Functional units of lungs are:

Alveoli

Air sacs

Bronchioles

Epithelial cells

60-Air sac consist of several microscopic alveoli which are:

Double layered structure

Triple layered structure

Single layered structure

Multi layered structures

MDCAT BIOLOGY-Life Processes:Gasesous Exchange (SMART INSTITUTE)

MDCAT Biology: Gaseous Exchange Quiz

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