Medical Quiz

Gaseous Exchange in Humans Quiz


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Gaseous exchange is by process of

A. respiration

B. diffusion


An asthmatic patient’s bronchiole walls become ………… and thick.

A. big

B. swollen

C. soft

D. rough


Which of the following is not Chronic Obstructive Pulmonary Disease (COPD)?

A. asthma

B. chronic bronchitis

C. emphysema

D. gastrisis


Name A

A. Trachea

B. Lung

C. Alveolus

D. Blood capillary


Which of the following is not correct about alveolus?

A. Thick wall

B. Thin wall

C. Moist wall

D. Large surface area


A maximum of ___ oxygen molecules can be transported by one molecule of haemoglobin.

A. 1

B. 2

C. 3

D. 4


Which of the following helps an asthmatic patient to breathe?

A. inhaler

B. medicine

C. mask

D. intravenous injection


Describe the nature of movement of oxygen within the blood and surrounding tissues

A. Moves down its electrochemical gradient

B. Moves down its partial pressure

C. Requires protein channels to diffuse across membranes

D. Moves out into the alveolar space from the capillaries


Most of the carbon dioxide produced by the body tissue is transported to the lungs in the form of …

A. Carbonic acid.

B. Blood plasma.

C. Bicarbonate ion.

D. Carbaminohaemoglobin.


In ……… , bronchiole becomes inflamed, swollen and blocked.

A. asthma

B. chronic bronchitis

C. emphysema

D. gastrisis


Oxyhaemoglobin gives up O2 when …

A. CO2 concentrations are high.

B. Body temperature is lowered.

C. pH values are high.

D. O2 concentrations are higher.


Which of the following is NOT the structure of haemoglobin?

A. Each haemoglobin molecule contains 4 haem group

B. Haemoglobin is a quaternary structure

C. Every each haem group in haemoglobin can bind with 4 molecule of oxygen

D. Each haemoglobin has 2 α-chain and 2 β-chain polypeptide subunits


Which of the following disease causes continuous coughing?

A. asthma

B. chronic bronchitis

C. emphysema

D. gastrisis


Carbon dioxide diffuses from ________ to alveolus

A. trachea

B. lung

C. blood capillary

D. bronchus


The bronchiole walls in an asthmatic patient becomes swollen and thick which leads to the following except

A. the opening of the bronchiole tube becomes larger

B. the air passage becomes narrower

C. difficulties in breathing

D. breathlessness


In ……… , the alveolus loses its elasticity and increases in size.

A. asthma

B. chronic bronchitis

C. emphysema

D. gastrisis


Oxygen diffuses from

A. Trachea to lung

B. Alveolus to blood capillary

C. Blood capillary to alveolus

D. Lung to trachea


Name B

A. Trachea

B. Lung

C. Alveolus

D. Blood capillary


Carbonic anhydrase in the erythrocytes …

A. Catalyzes the removal of oxygen from the erythrocytes.

B. Catalyzes the conversion of carbon dioxide into water.

C. Catalyzes the reaction of carbon dioxide with water to form carbonic acid.

D. Catalyzes the increase in blood pH.


Tiny air sacs for gaseous exchange . It looks like grape

A. Alveolus

B. Blood capillary

C. Lung

D. Trachea


Why the gaseous exchange becomes less efficient for an emphysema patient?

A. alveolus wall is moist

B. the total surface area of alveolus decreases

C. alveolus is elastic

D. alveolus decrease in size




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