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: Lymphocyte Overview.
Lymphocytes are leukocytes instrumental in immune responses. They encompass T-cells, B-cells, and natural killer (NK) cells, contributing to both adaptive and innate immunity. 

Step 2: Lymphocyte Size. 
Lymphocytes generally measure 10-15 micrometers. Larger lymphocytes indicate activated or immature cells, whereas smaller ones are quiescent. 

Step 3: Option Analysis. 
Option (A): Invalid. A size of 5-10 micrometers is typically too small for lymphocytes. 

Option (B): Valid. The standard size range for lymphocytes is 10-15 micrometers. 

Option (C): Invalid. A size of 15-20 micrometers is generally too large for lymphocytes. 

Option (D): Invalid. Lymphocytes do not attain sizes of 20-25 micrometers. \[ \therefore \text{The correct size range of lymphocytes is: 10-15 micrometers.} \]