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Question
Rishi contacts and survives an infectious disease such as measles, he tends not to get the disease again later in life. Which of the following cells provides immunity?
Rishi contacts and survives an infectious disease such as measles, he tends not to get the disease again later in life. Which of the following cells provides immunity?
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Solution
The correct option is A Lymphocytes
The encounter of B cell (lymphocytes) with a specific antigen activates its clonal expansion which in turn gives rise to plasma cell and memory cells. A plasma cell is a mature B cell that serves in mass production of antibodies against a specific antigen. Memory cells are the B cells responsible for long-term immunity. Upon the second encounter of a person with the same antigen, the already present memory cells divide quickly to produce more lymphocytes which in turn quickly produce antibodies. This kind of immune response selectively targeted against a particular antigen, to which body has previously been exposed, is known as acquired immunity and it prevents second-time infection. Therefore, the correct answer is option C.
The encounter of B cell (lymphocytes) with a specific antigen activates its clonal expansion which in turn gives rise to plasma cell and memory cells. A plasma cell is a mature B cell that serves in mass production of antibodies against a specific antigen. Memory cells are the B cells responsible for long-term immunity. Upon the second encounter of a person with the same antigen, the already present memory cells divide quickly to produce more lymphocytes which in turn quickly produce antibodies. This kind of immune response selectively targeted against a particular antigen, to which body has previously been exposed, is known as acquired immunity and it prevents second-time infection.
Therefore, the correct answer is option C.
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