The human body does not normally produce an immune response against self cells - VCE - SSCE Biology - Question 22 - 2022 - Paper 1
Question 22
The human body does not normally produce an immune response against self cells.
Cells in the human immune system can distinguish self cells from non-self cells
A. be... show full transcript
Worked Solution & Example Answer:The human body does not normally produce an immune response against self cells - VCE - SSCE Biology - Question 22 - 2022 - Paper 1
Step 1
A. because non-self cells have a faster reproduction rate.
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Answer
This statement is incorrect because the distinction between self and non-self cells made by the immune system is not primarily based on the reproduction rate of the cells.
Step 2
B. due to the presence of different antigens on non-self cells.
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Answer
This is the correct option. The human immune system recognizes non-self cells because they possess different antigens that are not present on self cells. These antigens trigger an immune response.
Step 3
C. only when antibodies are attached to the surface of non-self cells.
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Answer
This statement is misleading. While antibodies do play a role in recognizing non-self cells, the immune system can identify these cells based on their antigens even in the absence of antibodies.
Step 4
D. because non-self cells are always smaller in size than self cells.
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Answer
This statement is false. The size of cells does not determine whether they are self or non-self. The immune system's recognition is based on antigens rather than cell size.
