Diseases and Immunity
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Pathogens and transmission
SubtopicPathogens and transmission under Diseases and Immunity for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Which of these is an example of direct transmission of a pathogen?
A.Touching a contaminated surface like a door handle
B.Eating undercooked meat containing parasite larvae
C.Inhaling fungal spores from the soil
D.The transfer of body fluids during a blood transfusion
- 2.
The human body has several lines of defense against pathogens. Which of these is an example of a mechanical barrier?
A.The production of hydrochloric acid in the stomach
B.Hairs in the nose that trap dust and particles
C.Phagocytes that ingest and digest bacteria
D.The production of antibodies by lymphocytes
- 3.
How is the bacterium , which causes cholera, most commonly transmitted to humans?
A.Through the bites of infected female mosquitoes
B.By inhaling respiratory droplets from an infected person
C.By consuming food or water contaminated with feces
D.Through direct skin-to-skin contact with an infected individual
Download the worksheet for Diseases and Immunity - Pathogens and transmission to practice offline. It includes additional chapter-level practice questions.
Body defences
SubtopicBody defences under Diseases and Immunity for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
The diagram below shows the steps of a specific immune process. What is the name of this process?
A.Agglutination
B.Phagocytosis
C.Active Transport
D.Antibody synthesis
- 2.
What is the primary function of hydrochloric acid () in the stomach regarding body defense?
A.To kill many bacteria ingested with food
B.To provide an alkaline environment for enzymes
C.To emulsify fats for easier digestion
D.To produce memory cells in the gut
- 3.
How does the mucus produced in the lining of the breathing system act as a defense mechanism?
A.It dissolves the cell walls of viruses
B.It neutralizes the pH of the lungs
C.It traps pathogens so they can be removed by cilia
D.It acts as a site for antibody production
Download the worksheet for Diseases and Immunity - Body defences to practice offline. It includes additional chapter-level practice questions.
Antibodies and vaccination
SubtopicAntibodies and vaccination under Diseases and Immunity for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Which of the following is an example of passive immunity?
A.A child recovering from a measles infection
B.An adult receiving a flu vaccination
C.A baby receiving antibodies from mother's milk
D.A person producing antibodies after a cut
- 2.
Antibodies are highly specific molecules. What part of a pathogen do they specifically bind to?
A.Cell nucleus
B.Cell membrane lipids
C.Antigens
D.Cytoplasm
- 3.
What is the primary function of a vaccine in the human body?
A.To kill bacteria already present in the blood
B.To stimulate the immune system to produce memory cells
C.To provide the body with ready-made antibodies
D.To act as a physical barrier against viruses
Download the worksheet for Diseases and Immunity - Antibodies and vaccination to practice offline. It includes additional chapter-level practice questions.