Question

Increase in number of leukocytes beyond normal indicates
A. Anaemia
B. Infection
C. Increased defense against pathogen
D. Non formation of RBC

Answer 1

Hint: We have to remember that the leukocytes or leucocytes are also termed white blood cells (WBCs). These are the immune system cells that are active in defending the body from infectious diseases as well as from foreign invaders. Both white blood cells, known as hematopoietic stem cells, are formed and derived from multipotent cells in the bone marrow.

Complete answer: We must remember that the lack of red blood cells or defective red blood cells in the body results in anaemia. This contributes to decreased oxygen supply to the organs of the body. The body is protected by natural barriers and the immune system against pathogens that can cause infection. The bone marrow does not contain enough blood cells, including red blood cells, in individuals with aplastic anaemia.
A high count of white blood cells (leukocytes) is not a particular disease, but another concern, such as infection, stress, inflammation, trauma, allergy, or certain diseases, may be indicated. That is the reason why as a rule, a high white blood cell count needs further study.
An infection is the attack on the infectious agents and toxins they produce by disease-causing agents from the body tissues of an organism, their development, and the reaction of host tissues.
So, the correct answer is “Option B”.

Note:
Usually a high white blood cell count indicates that
-Bone marrow disease, which causes abnormally high white blood cell development.
-An immune system disorder that increases the development of white blood cells.
-Increased white blood cell output to combat an infection.
-A reaction to a medicine that boosts the production of white blood cells.