Which of the following is characteristic of all leukocytes?
A) They are the most numerous of the formed elements in blood.
B) They are nucleated.
C) They are phagocytic.
D) They have cytoplasmic granules.

Question

Quizplus · Accepted Answer

All leukocytes (white blood cells) are nucleated, which sets them apart from erythrocytes (red blood cells) which lack a nucleus. The other choices are not true of all leukocytes - A is incorrect because some leukocytes, such as lymphocytes, are less numerous than others, B is correct as already explained, C is incorrect because not all leukocytes are phagocytic, and D is incorrect because not all leukocytes have cytoplasmic granules (e.g. lymphocytes do not have granules).

Which of the Following Is Characteristic of All Leukocytes