Immune system
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La durée de la leçon est: 30 minÉléments de cette leçon
Slide 1 - Diapositive
Slide 2 - Vidéo
The immune system is built on millions of cells called
A
Blood cells
B
Immune cells
C
Leukocytes
D
Lymph nodes
Slide 3 - Quiz
The _______ carry the leukocytes around the body.
A
Bloodstream
B
nervous system
Slide 4 - Quiz
Phagocytes initially destroy invasive cells _______.
A
By alerting the immune system to their presence
B
By consuming them
Slide 5 - Quiz
Lymphocytes fight off the threat by producing _______.
A
Antibodies
B
Antigens
C
Desinfectant
Slide 6 - Quiz
Explain the relationship between antigens and antibodies.
Slide 7 - Question ouverte
The figure is a schematic drawing showing two antigens, P and Q, and an antibody.
Which antigen will the antibody attach to: P or Q?
Which antigen will the antibody attach to: P or Q?
A
Antigen P
B
Antigen Q
Slide 8 - Quiz
Yellow fever is a disease that is caused by a virus. After infection with the yellow fever virus, it takes about a week before the body starts making antibodies against the virus. In the diagram in the figure, curve Q shows production of antibodies against the virus the first time a specific individual is infected. That person recovers and then gets infected again a year later.
Which curve on the graph shows the production of antibodies after this second infection?
Which curve on the graph shows the production of antibodies after this second infection?
A
Curve P
B
Curve Q
C
Curve S
