Breathing and Exchange of Gases Test

Result

Breathing and Exchange of Gases Test - 3

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following statements is correct?

A
During inspiration external intercostal muscles and diaphragm contract.

B
Cyanosis means collapse of alveoli.

C
Eupnea is slow breathing.

D
Coryza is caused by human coronavirus.

Solution

Cyanosis is blueing of skin, because of deficient of oxygen in blood. Eupnea is normal breathing. Coryza(common cold) is caused by rhino virus.
Question 2
4 / -1

Which one of the following is the correct statement for respiration in humans?

A
Cigarette smoking may lead to inflammation of bronchi.

B
Neural signals from pneumotaxic center in pons region of brain can increase the duration of inspiration.

C
About 90% of carbon dioxide is carried by haemoglobin as carbaminohaemoglobin.

D
Workers in grinding and stone-breaking industries may suffer from lung fibrosis.

Solution

Grinding or stone breaking industries produce so mud dust that long exposure to this can give rise to inflammatior of lungs leading to fibrosis (proliferation of fibrous tissues' and thus causing serious lung damage. Inflammation ol the bronchi may also be caused by cigarette smoking. The primary function of pneumotaxic center is to limit inspiration which increase breathing rate.
Question 3
4 / -1

Given below are few respiratory disorders. Identify occupoational respiratory disorders among these.
(i) Coryza
(ii) SARS
(iii) Silicosis
(iv) Asbestosis
(v) Emphysema

A
(i) and (ii)

B
(i) and (v)

C
(iii) and (iv)

D
(i), (ii) and (v)

Solution

Silicosis and asbestosis are known as occupational disorder as they occur due to one's occuption. Workers working in industries where silica and asbestos are used can suffer from these respiratory disorders.
Question 4
4 / -1

Read the following four statements carefully.
(i) Asthma is a difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles.
(ii) The part of the respiratory system starting with the external nostrils up to the terminal bronchioles constitutes the respiratory or exchange part of the respiratory system.
(iii) During swallowing epiglottis can be covered by a thin elastic cartilaginous ilap calied glottis to prevent the entry of food into the larynx.
(iw) Binding of oxygen with haemoglobin is primarily related to partial pressure of O₂. Which of the above two statements are correct?

A
(ii) and (iii)

B
(iii) and (iv)

C
(i) and (ii)

D
(i) and (iv)

Solution

Both statements (i) and (iv) are correct. Asthma is a difficulty in breathing caused by inflammation of the bronchi and bronchioles, and the binding of oxygen to hemoglobin is primarily related to the partial pressure of O2.
Statements (ii) and (iii) are not correct. The respiratory system starts at the external nostrils and extends to the alveoli, not the terminal bronchioles. The epiglottis is a flap of cartilage that covers the glottis to prevent the entry of food into the larynx during swallowing, not the other way around.
Question 5
4 / -1

Emphysema is a condition resulting from

A
cigarette smoking

B
liquor consumption

C
drug addiction

D
reduced oxygen carrying capacity of blood.

Solution

Emphysema is a respiratory disorder which occurs due to the inflation or abnormal distension of the bronchioles or alveolar sacs resulting in the loss of their elasticity. Cigarette smoking and chronic bronchitis are the causes of this disease.