Disease and Immunity - IGCSE

The immune system recognises which part of a pathogen?

• Antibiotic

• Antigen

• Active site

• Antibody

What is pathogen?

• A bacterial cell

• A disease-causing organism

• A transmissible disease

• A phagocyte that engulfs bacteria

In many multicellular animals, pathogens are recognised as foreign and are attracked by the immune system.

WHich of the following may be produced during an immune response?

• Antigens

• Antibiotics

• Pathogen

• Antibodies

Which body defence listed below acts as a chemical barrier?

• Mucus lining the airways

• Antibody production

• Hairs in the nose

• Phagocytosis

Which of the options below is an example of a transmissible disease?

• Obesity

• Tooth decay

• Cholera

• Ricket

The human body has a number of barriers to prevent infection by pathogens some of which are listed below.

1. Skin

2. Mucus

3. Antibodies

4. Stomach acid

5. Hair in the nose

Which are these are examples of mechanical barrier?

• 1 and 4

• 2 and 3

• 3 and 5

• 5 and 1

Which of the following diseases listed below are not caused by infectious pathogens?

1. Coronary Heart Disease

2. Scurvy

3. AIDS

4. Cholera

• 1 and 2

• 1 and 3

• 2 and 3

• 3 and 4

Which of the following diseases caused by bacteria??

• Influenza and measles

• Malaria and athlete's food

• Measles and cholera

• Cholera and tuberculosis

Which of the following is an effect of a cholera infection?

1. Loss of water from the blood

2. Loss of cloride ions in intestine

3. Persistent diarrhoea

4. Increasing water potential in intestine at the begining infection

• 1 and 3

• 2 and 3

• 3 and 4

• All 4

There are numerous ways in which a person can acquire antibodies, giving immunity to a disease. Some of these are:

1. Vaccination

2. Infection by disease

3. A baby feeding on breast milk

4. Injection of antibody

Which of the options would give a person passive immunity?

• 1 and 2

• 1 and 3

• 2 and 3

• 3 and 4