Free Breathing And Exchange Of Gases (Daily Quiz: 8) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

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

(a) About 90% of carbon dioxide ($CO_{2}$ ) is carried by haemoglobin as carbaminohaemoglobin.

(b) Workers in grinding and stone-breaking industries may suffer from lung fibrosis.

(c) Cigarette smoking may lead to inflammation of bronchi.

(d) Neural signals from pneumatic centre in pons region of brain can increase the duration of inspiration.

Question-2

The partial pressure of oxygen in the alveoli of the lungs is

(a) Less than that in the blood

(b) More than that in the blood

(c) Les than that of carbon dioxide

(d) Equal to that in the blood

Question-3

The alveolar epithelium in the lung is

(a) non-ciliated squamous

(b) non-ciliated columnar

(c) ciliated columnar

(d) ciliated squamous

Question-4

The impulse for voluntary forced breathing starts in

(a) vagus nerve

(b) spinal cord

(c) medulla

(d) cerebrum

Question-5

The haemoglobin of a human fetus

(a) has a higher affinity for oxygen than that of an adult

(b) has only 2 protein subunits instead of 4

(c) has a lower affinity for oxygen than that of the adult

(d) its affinity for oxygen is the same as that of an adult