Question

Which of the following is true for all types of leucocytes?
1) There are nucleated and long lived
2) There are colourless and relatively more in number
3) These are granulated and phagocytic
4) These are nucleated and generally short lived​

Answer 1

Required Answer:-

Which of the following is true for all types of leucocytes?

1. There are nucleated and long lived
2. There are colourless and relatively more in number
3. These are granulated and phagocytic
4. These are nucleated and generally short lived. ✓

Explanation:-

The question says about all types of leucocytes. That includes both granulated and agranulated leucocytes. Here we have to compare the leucocytes with other blood cells.

• All types of leucocytes have nucleus, maybe lobed or Maynot be.
• They have shorter lifespan as compared to erythrocytes (red blood cells).
• They are lesser in number as compared to the number of erythrocytes.
• Yes, They can be phagocytic as well$.$

But,

• We have to eliminate the option with atleast one or two characteristics that doesn't match with that of leucocytes.
• Hence, Option 4 should be the correct one because all types of leucocytes are nucleated and short lived (15-20 days).

Answer 2

Answer:

The correct answer for leucocytes is that these are nucleated and generally short-lived. The correct option is 4)

Explanation:

• Leucocytes are also known as white blood cells. These are the cells of the immune system. There are two types of leucocytes one is granulocytes and another is agranulocytes. All of these are nucleated (which may be lobed or may not be).
• They have a shorter lifespan (approximately 1 to 3 days) as compared to erythrocytes (the erythrocytes have a life span of about 110 to120 days).
• They are lesser in number (the normal range of WBCs is from 4,500 - 11,000/ml) as compared to the number of erythrocytes (the normal range of RBCs are from 4-6 million cells/mcL).

Hence, the correct option is 4)