Why Is a Second Weapon System (Specifically Cell-Mediated Immunity)in Addition

question 36

Multiple Choice

Why is a second weapon system (specifically cell-mediated immunity) in addition to humoral immunity needed to defend the body against invading pathogens?

• A)Humoral immunity is ineffective against antibodies.
• B)Antibodies are not effective against pathogens that are present inside cells.
• C)Antibodies are not effective against pathogens that are present outside cells.
• D)If used too often,antibodies can attack red blood cells.
• E)Antibodies are typically ineffective against bacteria,while they work well against viruses.

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Definitions:

AIDS

Acquired Immune Deficiency Syndrome, a life-threatening condition caused by the human immunodeficiency virus (HIV), which severely damages the immune system.

Virus

A microscopic infectious agent that can replicate only inside the living cells of an organism, causing a variety of diseases.

STI

Sexually Transmitted Infections, infections that are transmitted through sexual contact, caused by bacteria, viruses, or parasites.

Chlamydia

A common sexually transmitted infection caused by the bacterium Chlamydia trachomatis, often asymptomatic but treatable with antibiotics.