Question
Question: Match the types of WBC listed in Column I with the shape of the nucleus given under column II. Choos...
Match the types of WBC listed in Column I with the shape of the nucleus given under column II. Choose the answer which gives the correct combination of alphabets of two columns.
| Column I | Column II |
|---|---|
| Types of WBC | The shape of the nucleus |
| a. Neutrophils | p. kidney shape |
| b. Eosinophils | q. S-shaped |
| c. Basophils | r. 3-5 Lobes |
| d. Monocytes | s. 2 lobes |
| t. disc-shaped |
A. a=r, b=t, c=p, d=q
B.a=t, b=r c=q, d=s
C. a=q, b=p, c=t, d=r
D. a=r, b=s, c=q, d=p
Solution
WBCs are white blood cells and are known as immunity cells of the body. These cells provide immunity against various infections. White blood cells are of many types such as basophils, eosinophils.
Complete answer: White blood cells also called leukocytes are cells of the immune system and are present in the blood and lymphatic system. White blood cells are different from Red blood cells due to the presence of nuclei in them. WBCs are broadly divided into two groups, such as granulocytes and agranulocytes; which are associated with five types of cells, such as neutrophils, eosinophils, basophils, monocytes and lymphocytes. These cells perform different functions against different pathogens.
a) Neutrophils have 3-5 lobed nuclei and less number of granules. They are numerous of all leukocytes and are phagocytic in nature.
b) Eosinophils have two-lobes with coarse granules which take acid stains. Their number increases with allergic conditions such as fever and asthma.
c) Basophils have a three-lobed nucleus that resembles s-shape and has less number of coarse granules. Their granules take basic stains and they keep on releasing heparin and histamines.
d) Monocytes are the largest of all types of leukocytes and they look like a kidney in shape with much cytoplasm. The nucleus is bean-shaped and they change into macrophages when they enter into tissue spaces.
Hence the correct answer is option D.
Note: The disorder of leukocytes or white blood cells will lead to dysfunctioning of the immune system. Some of the disorders related to leukocytes are leukopenia, which occurs due to the decrease in WBCs, neutropenia, which occurs due to the decrease in neutrophils cells, and lymphocytopenia, etc.