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97

Question 97

Which one of the following statements best describes the role of B cells and T cells in the human body?

AOptions

A
A) They protect the body from environmental allergens.
B
B) They alleviate the body's pain and inflammation.
C
C) They act as immunosuppressants in the body.
D
D) They protect the body from the diseases caused by pathogens.

BSolution

B cells (B lymphocytes) and T cells (T lymphocytes) are both types of white blood cells (lymphocytes) that play crucial roles in the adaptive (specific) immune system of the human body. They are responsible for recognizing and targeting specific pathogens (like bacteria, viruses, fungi, and parasites) and abnormal cells (like cancer cells).

  • B cells: Primarily produce antibodies, which are proteins that target and neutralize specific pathogens or toxins. This is known as humoral immunity.
  • T cells: Directly kill infected cells (cytotoxic T cells) or help regulate other immune cells (helper T cells). This is known as cell-mediated immunity.

Together, their coordinated action provides specific, long-lasting immunity against a wide range of diseases caused by pathogens. Therefore, option D best describes their role.

Diagram for Q97

CStrategy

For questions on human biology and immunity, understand the fundamental roles of key cells and molecules. Focus on the primary function and avoid distractors that describe secondary or unrelated effects.

DSyllabus Analysis

This question is from Science and Technology, specifically Biology, focusing on the human immune system and the function of B and T lymphocytes.

EQuestion Analysis

Easy. The role of B and T cells in fighting pathogens is a fundamental concept in immunology and general biology education.