Which statement is true for WBC?
- Non-nucleated
- In deficiency, cancer is caused
- Manufactured in thymus
- Can squeeze through blood capillaries
Answer
(4) Can squeeze through blood capillaries
Solution
As per NCERT, leucocytes (WBCs) are nucleated and colourless; they are produced in the bone marrow.
⇒ They are amoeboid and can squeeze out through the walls of blood capillaries (diapedesis) to reach sites of infection.
A deficiency of WBCs lowers immunity; it does not cause cancer (an abnormal increase is seen in leukaemia).
Answer: (4)