Immunity

The immune system:

• Helps the body to defend against infectious organisms and other invaders.

• Enables us to cope with and process our emotions.

• Helps us to digest food.

• Helps people to sense their surroundings.

An infectious disease is caused by

• Lack of exercise

• A pathogen entering our internal environment and either growing too much OR producing substances that are harmful to our internal environment.

• Toxic chemicals entering our internal environment and causing cell death.

• Poor diet/nutrition

Type 2 diabetes is caused by

• Too much salt in the body

• Allergies to insulin

• The body becoming resistant to insulin in the body.

• Pancreas not working and can NOT produce insulin

Match the following

• Third line of defence

• Fights all types of pathogens once they have entered the body.

• Second line of defence

• Fight off specific pathogens, and remember pathogens that have previously invaded.

• First line of defence

• Skin, hair, chemical secretions such as mucus, saliva and tears.

Which is NOT part of the second line of defence?

• Histamine

• Neutrophils

• White blood cells

• Lymphocytes

Label the following action that the white blood cell has taken

a

b

c

d

Pathogen

White blood cell

Antibody

Antigen

What is the primary function of the immune system?

• To attack healthy cells in the body

• To protect the body from harmful pathogens

• To promote the growth of harmful pathogens

• To cause inflammation and damage to tissues

Which of the following is NOT a type of white blood cell?

• Platelets

• Lymphocytes

• Neutrophils

• Red blood cells

What is the main cause of type 1 diabetes?

• Genetic mutation

• Poor diet

• Viral infection

• Autoimmune response

Which of the following is NOT a function of white blood cells?

• Producing antibodies

• Fighting infections

• Transporting oxygen

• Regulating body temperature