The Immune System Vocabulary

The protein produced by B cells that helps to neutralize pathogens is called ________.

• antibody

• enzyme

• hormone

• antigen

The type of white blood cell that produces antibodies is called a ________.

• B cell

• T cell

• Neutrophil

• Monocyte

A single-celled microorganism that can cause disease is called a ________.

• bacterium

• virus

• fungus

• protozoan

A ________ is a substance that can destroy or inhibit the growth of harmful organisms and is part of the body's defense system.

• chemical barrier

• mechanical barrier

• physical barrier

• nutrient

Tiny hair-like structures that help move mucus and trapped particles out of the respiratory tract are called ________.

• cilia

• alveoli

• bronchioles

• villi

A disease that can be spread from one person to another is called a ________.

• contagious disease

• hereditary disease

• deficiency disease

• degenerative disease

Any condition that impairs the normal functioning of the body is called a ________.

• disease

• medicine

• vaccine

• exercise

An increase in body temperature that helps the body fight infection is called a ________.

• fever

• rash

• bruise

• fracture

The body's initial defense mechanism against pathogens is known as the ________.

• first line of defence

• immune response

• second line of defence

• antibody production

What is E. coli? E. coli is a type of ______ that causes disease by attaching to cells and releasing toxins.

• bacteria

• virus

• fungus

• protozoa