Question

What is the approximate size range of lymphocytes, a type of white blood cell?

• A. 5-10 micrometers.
• B. 10-15 micrometers.
• C. 15-20 micrometers.
• D. 20-25 micrometers.

Hint:

Lymphocytes are small white blood cells that play key roles in adaptive immunity. Their size typically ranges between 10-15 micrometers.

Answer 1

The Correct Option is B

Step 1: Understanding lymphocytes.
Lymphocytes are a type of white blood cell (WBC) involved in the immune response. They include T-cells, B-cells, and natural killer (NK) cells, which play roles in adaptive and innate immunity. Step 2: Size range of lymphocytes.
Lymphocytes typically range in size from 10-15 micrometers. Larger lymphocytes are generally activated or immature forms, while smaller ones are resting lymphocytes. Step 3: Explanation of options.
Option (A): Incorrect. The size range of 5-10 micrometers is too small for most lymphocytes. Option (B): Correct. Lymphocytes typically range between 10-15 micrometers. Option (C): Incorrect. 15-20 micrometers is too large for most lymphocytes. Option (D): Incorrect. Lymphocytes do not reach 20-25 micrometers in size. \[ \therefore \text{The correct size range of lymphocytes is: 10-15 micrometers.} \]