Science Practice Quiz 54

Q1.What is a key characteristic of haemoglobin and where is it primarily found in the human body?

A. Low affinity for oxygen, in plasma B. High affinity for carbon dioxide, in white blood cells C. High affinity for oxygen, in red blood corpuscles D. Low affinity for oxygen, in platelets

Q2.How is carbon dioxide primarily transported in human blood, given its solubility compared to oxygen?

A. Bound to haemoglobin, as it has higher affinity B. In dissolved form, as it is more soluble in water C. As bicarbonate ions, due to its low solubility D. Attached to plasma proteins, for efficient transport

Q3.What is the primary function of cilia, the small hair-like structures in the upper respiratory tract?

A. To facilitate gas exchange B. To produce mucus C. To remove germs, dust, and harmful particles from inhaled air D. To regulate air temperature

Q4.What is a direct consequence of smoking on the cilia in the respiratory tract?

A. It strengthens the cilia, improving their function B. It increases the number of cilia, enhancing protection C. It destroys the cilia, allowing harmful particles to enter the lungs D. It makes the cilia more sensitive to temperature changes

Q5.Which health issue is explicitly mentioned as a common cause of death and linked to smoking in the provided text?

A. Heart disease B. Diabetes C. Lung cancer D. Asthma

Q6.If the alveolar surface in human lungs were spread out, approximately how much area would it cover?

A. 8 m² B. 80 m² C. 800 m² D. 0.8 m²

Q7.How long would it take for a molecule of oxygen to travel from the lungs to the toes in the human body if diffusion were the sole mechanism of transport?

A. 3 months B. 1 year C. 3 years D. 5 years

Q8.What substance is highlighted in the text as crucial for efficient oxygen transport in human beings, making the slow process of diffusion over long distances unnecessary?

A. Plasma B. Glucose C. Haemoglobin D. Carbon dioxide

Q9.What type of tissue is blood?

A. Epithelial tissue B. Muscular tissue C. Nervous tissue D. Fluid connective tissue

Q10.In the human blood, what is the fluid medium in which the cells are suspended?

A. Lymph B. Serum C. Plasma D. Interstitial fluid

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Science Practice Quiz 54