The antibodies a newborn baby receives across the placenta and in its mother's milk provide
Correct answer: A. natural passive immunity
- A. natural passive immunity
- B. natural active immunity
- C. artificial passive immunity
- D. no immunity at all
Explanation
The baby is given ready made antibody rather than making its own, so the protection is passive, and because it comes through a natural route rather than an injection it is natural. It covers the first few months while the infant's own immune system is still immature, then disappears, which is why vaccination begins early. An injection of antitetanus serum is the artificial version of the same thing.
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About Specific Defense Mechanism
Specific defense mechanisms provide targeted immunity through B lymphocytes, T lymphocytes, antibodies and memory cells that recognize particular antigens. Questions cover humoral and cell mediated responses, clonal selection, primary and secondary immune responses, vaccination and passive immunity, while distinguishing adaptive defenses from the immediate, non specific innate response.
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