Choose the correct statement(s) from the following.
A
Arteries are thick-walled and have narrow lumen as compared to veins.
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B
WBCs play a very important role in blood clotting.
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C
Person with blood group AB can donate blood to anyone.
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D
In diseases such as dengue, platelet count decreases to a great extent.
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Solution
The correct options are A Arteries are thick-walled and have narrow lumen as compared to veins. D In diseases such as dengue, platelet count decreases to a great extent.
Arteries are thick-walled since, the blood flowing through them is at a higher pressure.
Lumen is a hollow passageway through which the blood flows. Arteries have a narrow lumen than veins which helps them to maintain the pressure of blood flowing.
In diseases such as dengue, platelet count decreases to a greater extent. Platelets are formed from bone marrow and dengue virus leads to bone marrow suppression. This leads to reduced platelet count in the body.
A person with AB blood group cannot donate blood to person with O blood group. But can receive blood from anyone.
Platelets play an important role in blood clotting, while WBCs attack the pathogens entering the body and protect from microbial diseases.