Grade 10 Immunity and diseases

1. 1. Which definition of "pathogen" is incorrect?

• an organism causing disease to its host, with the severity of the disease symptoms referred to as virulence.

• are taxonomically widely diverse and comprise viruses and bacteria as well as multicellular and eukaryotes.

• are taxonomically widely diverse and comprise viruses and bacteria as well as unicellular and multicellular eukaryotes.

• include viruses, bacteria, fungi, and parasites that invade the body and can cause health issues

Complete the sentence. The _________is a complex network of organs, cells and proteins that defends the body against infection, whilst protecting the body's own cells.

3. 3.White blood cells are also called _________. They protect you against illness and disease.

• 3. leukocytes

• Leokosites

• leucocytes

• luekocytes

An ______ is any substance that causes your immune system to produce antibodies against it

Antibodies are _______ that protect you when an unwanted substance enters your body. Produced by your ______ system

Which sentence best describe lymphocytes

• Lymphocytes are a type of white blood cell. They help your body's immune system fight cancer and foreign viruses and bacteria.

• Lymphocytes are a type of white blood cell. They help your body's immune system to keep cancer and foreign viruses and bacteria.

• Lymphocytes are a type of white blood cell. They help your body's circulatory system fight cancer and foreign viruses and bacteria.

• Lymphocytes are a type of white blood cell. They help your body's immune system fight cancer and keep foreign viruses and bacteria.