In humans, nonspecific immunity includes
A - VCE - SSCE Biology - Question 22 - 2002 - Paper 1
Question 22
In humans, nonspecific immunity includes
A. production of antibodies by plasma cells.
B. different responses for different bacteria.
C. destruction of bacteria by... show full transcript
Worked Solution & Example Answer:In humans, nonspecific immunity includes
A - VCE - SSCE Biology - Question 22 - 2002 - Paper 1
Step 1
A. production of antibodies by plasma cells.
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Answer
This statement refers to specific immunity, specifically the adaptive immune response. Plasma cells produce antibodies that target specific pathogens, which is not a characteristic of nonspecific immunity.
Step 2
B. different responses for different bacteria.
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Answer
Nonspecific immunity does not differentiate between different pathogens or bacteria; instead, it provides a generalized response. Therefore, this statement is incorrect for nonspecific immunity.
Step 3
C. destruction of bacteria by enzymes in saliva.
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Answer
This is a true statement about nonspecific immunity. Enzymes in saliva, such as lysozyme, play a role in breaking down bacterial cell walls, thus contributing to the nonspecific defense mechanisms.
Step 4
D. presentation of material to a T cell by a phagocyte.
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This involves the activation of specific immunity, as T cells are part of the adaptive immune response. Phagocytes present antigens to T cells, which is not characteristic of nonspecific immunity.
