This sticky fluid traps any pathogens that try and get in our body

• Mucous Lining

• Blood

• Stomach Acid

• Skin

What are two examples of chemical barriers?

• Lysozyme enzyme in our tears

• Skin

• White Blood Cells

• Stomach Acid

Which of the following is the name for a micro-organism that can cause disease?

• Pathogen

• Antibodies

• B-cells

• Lymphocyte

Which of the following is a type of white blood cell that will help to destroy pathogens which get past our physical barriers and chemical defences?

• bacterium

• antibody

• antigen

• lymphocyte

Tags

NGSS.HS-LS1-4

What attaches to antigens and tags the pathogen for destruction?

• Pathogen

• Antibodies

• B-cells

• Lymphocyte

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

• antigen

• antibodies

• B cells

• T cells

What do memory lymphocytes do?

• Kills the virus

• Eats the virus

• Patrol the area and make the immune system work faster next time.

• Makes antibodies

The body's ability to destroy pathogens before they can cause disease is called:

• Tolerance

• Immunity

• Vaccine

• Inflammatory response

Which cells produce antibodies to pathogens?

• Red blood cells

• Bacteria

• lymphocytes

• phagocytes

The diagram shows a lymphocyte. What is the arrow pointing to on the surface of the lymphocyte?

• molecules called antigens

• molecules called antibodies