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WorksheetsChapter 25 test
Total questions: 10
Worksheet time: 5mins
Which of the following is not a physical barrier in the human body?
epidermis of the skin
tears produced by tear glands
mucus produced in the trachea
hair in the nostrils
Peter had a cut on his finger. He found that the skin surrounding the wound had become red and swollen. Which of the following is a possible reason for this?
The skin turned red because the body temperature increased.
The skin turned red because there was infection.
The skin became swollen because phagocytes were producing antibodies.
The skin became swollen because there was an accumulation of tissue fluid.
Phagocytes kill pathogens in two main steps. Which of the following correctly describes the steps?
A
B
C
D
Which of the following descriptions about antibodies is incorrect?
They can kill pathogens by carrying out phagocytosis.
They are produced by B cells.
They are protein in nature.
The specificity of an antibody is due to its antigen-binding site.
What do W, X, Y and Z represent respectively?
A
B
C
D
Which type of cells is responsible for destroying viral infected cells?
B cells
plasma cells
killer T cells
helper T cells
The immunity passed from a mother to a baby through breast feeding can be described as
active immunity acquired naturally.
active immunity acquired artificially.
passive immunity acquired naturally.
passive immunity acquired artificially.
The graphs show the primary and secondary responses of a child when she was infected by the same virus twice.
Which of the following accounts for the difference between the two responses?
There are some antigens remain after the primary response.
There are some antibodies remain after the primary response.
The virus becomes weaker.
The virus is memorized by memory cells.
The graph shows the changes in the antibody level after injections of a vaccine and the booster.
The vaccine injected may contain
(1) memory cells
(2) antigens
(3) antibodies
(2) only
(1) and (2) only
(2) and (3) only
(1), (2) and (3)
The graph shows the changes in the antibody level after injections of a vaccine and the booster.
Why did the antibody level rise drastically after the injection of the booster?
The booster stimulates rapid antibody replication in the human body.
The antibody is specific to the substance in the booster.
Memory cells specific to the substance in the booster are already present in the human body.
The substance in the booster is rapidly neutralized by the antibodies.
