Defense

Which 2 features does your nose have to prevent pathogens from entering the body?

(a)  

What lines your trachea to help prevent pathogens from entering your lungs?

(a)  

Name the acid in your stomach that can destroy pathogens.

(a)  

What is the name given to the substances in your tears that can destroy pathogens?

• lysozymes

• enzymes

• tears

White blood cells can make antitoxins, engulf and ingest pathogens and make (a)  

What shape is an antibody compared to an antigen?

• Complementary

• Mirror image

• The same shape

What is the name given to the cells that stay in the body and form part of your immunity to a pathogen?

• Lymphocytes

• Memory cells

• White blood cells

• Antibodies

What is the name given to the process of engulfing and ingesting pathogens by phagocytes (white blood cells) called?

(a)  

Which 2 categories do our defence mechanisms fall into?

• Physical and Chemical

• Physical/Chemical and the Immune System

• Non-specific and specific

• Fight or Flight

Which defense structure would best discourage animals from eating or landing on a plant? (a)  

• Fruits

• Pistil

• Thorns

• Stamen