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BIOLOGY

JAMB 2011 - Question 13

Biology 2011 JAMB Past Questions - Question 13: Which of the following is true of leucocytes?

Choose the most appropriate option for the gap .

Which of the following is true of leucocytes?

A: . They are large and nucleated

B: They are involved in blood clotting

C: . They are respiratory pigments.

D: They are most numerous and ramify all cells

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Correct Answer

Explanation

Leucocytes are white blood cells. Each white blood cell is large in their size, very active, short lived (3 months) and possesses a former colony. nucleus (nucleated) Red blood cells (erythrocytes) have respiratory pigment called haemoglobin for attracting and transporting oxygen to the cells. They are numerous. The platelets or thrombocytes are responsible for blood clotting.