Chapter 17 Lesson 2 The Immune System

What is the body's first line of defense against disease?

• skin

• blood

• antibodies

• enzymes

What is the main purpose of the immune system?

• support the body through bones and muscles
• get rid of waste from the body
• protect the body from pathogens
• move blood through the body

A(n) ________ is a substance that causes an immune response. It can be on the surface of a(n) pathogen.

• antigen

• antibodies

• B cells

• T cells

_________ form in the bone marrow and mature in the thymus gland.

• antigen

• antibodies

• B cells

• T cells

_________ form and mature in the bone marrow.

• antigen

• antibodies

• B cells

• T cells

Proteins called _______ can attach to the antigen and make it useless.

• antigen

• antibodies

• B cells

• T cells

A(n) ______ is an overly sensitive immune response to common antigens.

• allergy

• antibody

• B cell

• T cell

The resistance to specific pathogens is ________.

• allergies

• antibodies

• immunity

• antigens

A(n) _______ puts weakened or dead pathogens in the body, usually by injection or by mouth.

• vaccination

• antibodies

• immunity

• antigens

If the body produces antibodies in response to an antigen, this is called _________.

• passive immunity

• antibodies

• active immunity

• antigens